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Endura Flap Thermo Panel 3e

Endura Flap Thermo Panel 3e

Regular price
$519.99
Sale price
$519.99
Unit price
per 
White
Brushed Aluminum
Dark Bronze/Black

  • Aluminum framed, insulated dog door for sliding glass doors  with  widths from 11.25 -17.25 inches
  • Low-E glass enhances energy efficiency and UV protection
  • Adjustable heights and custom sizes for the perfect fit
  • Easy, semi-permanent installation perfect for renters or vacation homes
  • Secure locking cover for added safety and control
  • Note:  If your track height does not fit in one of the ranges on this page (77.25" - 80.25",  74.75" - 77.75" or  93.25" - 96.25") you can order a Custom Height Thermo Panel 3e.
Superior Weather Resistance Superior Weather Resistance
Great for Renters Great for Renters
Easy Installation Easy Installation

Product Details

  • Premium pet door solution: The Endura Flap Thermo Panel 3e is designed for sliding glass doors and offers a convenient way to grant your pets the freedom they desire
  • Easy installation and removal: With a removable panel and spring-loaded top, this pet door is perfect for rental properties or vacation homes
  • Energy efficiency: Low-E glass reduces infrared and ultraviolet light exposure, while the polyolefin polymer flap withstands temperatures as low as -40°F and includes magnetic closure on three sides for enhanced weather resistance
  • Customizable to fit your home: Adjustable heights and custom sizes accommodate a variety of sliding glass door models with tracks at least 1" thick; available in white, black, and brushed aluminum to match your interior design
  • Secure and sturdy: The Thermo Panel 3e includes a heavy-duty molded ABS locking cover and C-Clamp Lock to provide added security when needed
  • Highly-rated by pet lovers: Many have praised the Thermo Panel 3e's easy installation, exceptional insulation, and durable construction, giving their pets the freedom to come and go as they please
  • Lifetime warranty and US-based customer support: Enjoy peace of mind with a lifetime warranty and dedicated customer support for your Endura Flap Thermo Panel 3e pet door
  • Customize for your pet's comfort: Adjustable step over  height allows you to tailor the patio pet door panel to your pet's size so that they may comfortably use the pet door
  • For a dual-pane glass option, see the Endura Dual Pane Thermo Panel 3e

Size Chart

Flap Dimensions:

6"w x 11"h

The entry way your dog goes through.

Overall Panel Width

10 3/16"

How wide your panel is.
flap dimensions
epanel width
step over height

Step-Over Height

3” - 5”

The distance from the bottom of the panel to the bottom of your flap.

Flap Dimensions:

8"w x 15"h

The entry way your dog goes through.

Overall Panel Width

12 1/4"

How wide your panel is.
flap dimensions
epanel width
step over height

Step-Over Height

3” - 5”

The distance from the bottom of the panel to the bottom of your flap.

Flap Dimensions:

10"w x 19"h

The entry way your dog goes through.

Overall Panel Width

14 1/4"

How wide your panel is.
flap dimensions
epanel width
step over height

Step-Over Height

3” - 7”

The distance from the bottom of the panel to the bottom of your flap.

Flap Dimensions:

12"w x 23"h

The entry way your dog goes through.

Overall Panel Width

16 5/16”

How wide your panel is.
flap dimensions
epanel width
step over height

Step-Over Height

3” - 7”

The distance from the bottom of the panel to the bottom of your flap.
Flap SizeFlap DimensionStep Over RangeOverall Panel WidthRecommended Pet Height
Small6" w x 11" h3" - 5"10-3/16"9" - 15"
Medium8" w x 15" h3" - 5"12-1/4"9" - 21"
Large10" w x 19" h3" - 7" (ships at 5")14-1/4"9" - 27"
Extra Large12" w x 23" h3" - 7" (ships at 5")16-5/16"9" - 34"

Note: Endura Flap is not recommended for kittens or very small dogs.

Important Information about Custom Heights

Custom Height Minimum & Maximum Heights
ModelMinimumMaximum
Small 35"100"
Medium 42"107"
Large 48"117"
Extra Large 46"123"


Custom orders are final sale once built. They are essential in two situations:

While most sliding glass door track heights are in the three standard height ranges offered, some are not. In those cases, we can build a Thermo Panel 3e in a custom height to fit your specific dimension. 

The second situation is when you have a side-sliding window. A sliding window is essentially a miniature sliding glass door, and you can install a custom height panel, provided the window track is at least 1" wide.

Find The Best Pet Door Size For My Pet

calculator.jpg

A

Pet Height: inches

B

Pet Width: inches

Please fill the above fields.

Additional Information

Frame Material

Architectural Extruded Aluminum

Track Width Minimum

1"

Flap Thickness

7/8"

Warranty Period

Lifetime

Return Period

90 days (except for custom sizes)

Locking Cover Material

Heavy-Duty Molded ABS

Climate Suitability

Severe-4 Season

House Locking Method

C-Clamp Lock

Flap Design

Single, Flexible, Insulated Flap

Ability to Lock Flap

Separate Locking Cover-Loads from Top

Can Be Installed In

Dual Pane Glass Sliding Glass Door, Single Pane Glass Sliding Glass Door, Vinyl-Framed Sliding Glass Door, Sideways Sliding Windows

Custom Heights Available

Yes

Sealing Value

Very High

Wind Resistance

Very High

Replacement Flaps Available

Yes

Insulation Value

High

Installation Instructions

Click to view the Two-Piece Thermo Panel 3e Installation Instructions.

Installation icon Printable Version
Installation icon Difficulty Easy
Installation icon Steps 06
Installation icon Time Required 0.5 hours
Installation icon Sections 02
Installation icon Flags 02

Parts

  • Panel Pet Door
  • Foam Weather Strip
  • Center Post Weather Seal Draft Stopper
  • Sliding Door C-Clamp Lock
  • Screwdriver

Tools

  • Flathead Screwdriver

Please read instructions & notes thoroughly before installation.

One-Piece Panel (Panels Shorter Than 80")

Step 1: Step Over Adjust the Step Over (Optional)

  • The Endura aluminum sliding door panel has a patented Adjustable Step-Over feature which allows you to adjust the height of the flap to the most comfortable fit for your pet.
  • The top of the flap should be positioned to be at least 1” above the top of the pet’s shoulder.
  • If the factory setting is not suitable, please adjust it before proceeding. If the current setting is suitable, proceed to the “Installation Instructions” section.

Step 2 Adjust the Screws

  • Lay the entire panel on a flat surface.
  • Using a #2 flat head screwdriver, remove the bottom side-screws and loosen the upper side-screws. Screws were tightly installed to hold the panel together during shipping; a power tool* is recommended.
  • If you do not have a flat head drill bit skinny enough to fit, let us know and we’ll send you one for free.

Step 3 Adjust the Spacers

  • Once the bottom screws have been removed and the upper side-screws loosened, the Pet Door Assembly and spacers can be removed by sliding the sections down and out of the panel.

Step 4 Replace the Spacers

  • Replace the spacers and the Pet Door Assembly by sliding them back in a different order to achieve the desired height. You can move the spacer below and above the flap to raise or lower the flap height.
  • The order of the pieces is important! The piece on the bottom needs to always be at the bottom, as that is where the screws attach.
  • Make sure that the locking cover side of the flap frame is on the same side as the height adjustment locks.

Step 5 Tighten the Screws

  • When finished, replace the bottom side-screws and tighten the next upper-side screws.
  • A lower step-over height is easier for pets to navigate. However, if the top of the flap is low enough that the pet needs to crouch to get through their pet door, they can injure themselves and possibly cause the pet door to malfunction. If your pet door does not sit at a comfortable height for your pet, you may need a larger flap size.

Step 1: Install the Panel Spring Mechanism

  • Loosen the height adjustment locks at the top of the pet panel with the screwdriver. This allows the spring mechanism to move freely up and down.

Step 2 Test Fit the Panel in Your Track

  • You want to put the pet door in your track before applying any weather stripping to ensure it fits. If the panel fits well, proceed to the next step. See the FAQs if you have trouble.
  • To insert the panel into the top track, push up against the spring mechanism and swing the bottom of the panel up and over the threshold.
  • Seat the panel on top of the small guide rail in the track.
  • If you can’t quite get it in the track, try swinging in from the outside as the outside track wall may be shorter.

Step 3 Apply the Weatherstripping

  • Once you’re sure the panel fits, remove it from the frame and lay it on its side on the ground.
  • Apply the foam weather-stripping by peeling back the paper and exposing the adhesive.
  • Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides, trim it fit with scissors.

Step 4 Install the Draft Stopper

  • The center post weather seal strip (draft stopper) should be installed on the inside of the home.
  • It can install on either the back edge of the sliding door panel or the leading edge of the stationary panel.
  • This strip prevents air from leaking between the sliding glass door and the stationary panel.
  • Trim with scissors as needed. Clean the edge of your patio door with rubbing alcohol before installing to assure a good seal.
  • Repeat step two to install the panel in your track.

Click to view the One-Piece Thermo Panel 3e Installation Instructions.

Installation icon Printable Version
Installation icon Difficulty Easy
Installation icon Steps 06
Installation icon Time Required 0.5 hours
Installation icon Sections 03
Installation icon Flags 02

Parts

  • Top Glass Panel Section
  • Bottom Flap Section
  • Foam Weather Strip
  • Center Post Weather Seal Draft Stopper
  • 4 Flathead Screws
  • Flathead Screwdriver
  • Screwdriver for Adjustment Locks
  • Sliding Door C-Clamp Lock

Tools

  • Flathead Screwdriver

Please read instructions & notes thoroughly before installation.

Two-Piece Panel (Panels 80" and Taller)

Step 1: Step Over Adjust Step Over Height (Optional)

  • The Endura aluminum sliding door panel has a patented Adjustable Step-Over feature which allows you to adjust the height of the flap to the most comfortable fit for your pet.
  • The top of the flap should be positioned to be at least 1” above the top of the pet’s shoulder.
  • If the factory setting is not suitable, please adjust it before proceeding. If the current setting is suitable, proceed to the “Installation Instructions” section.

Step 2 Rearrange the Pieces

  • Simply slide the pieces up and out from the bottom half of your panel to rearrange.
  • Loosen a bottom screw if the pieces are too snug to move.

Step 3 Reconnect the Pieces

  • Replace the spacers and the Pet Door Assembly by sliding them back in a different order to achieve the desired height.
  • You can move the spacer below or above the flap to raise or lower the flap height.

Step 4 Screw the Pieces Together

  • The order of the pieces is important! The piece on the bottom needs to always be at the bottom, as that is where the screws attach. You can now assemble the patio panel!

Step 1: Connect the Sections Align the Connectors

  • Align the aluminum connectors extending from the bottom flap panel section with the top glass panel section.
  • Press the aluminum connectors into the holes at the bottom of the top glass panel section.
  • Ensure locking cover & height adjustment locks are on the same side!

Step 2 Tap the Pieces Together

  • Gently tap the bottom surface of the panel against the ground to completely insert the connectors.
  • Protect hard surfaces to prevent scratching.
  • The components of the panel are designed to slide together very tightly.

Step 3 Secure the Sections

  • Fasten the two panels together using the four flathead screws and countersunk washers found in the panel packaging.
  • Use the included flathead screwdriver to tighten all four flathead screws and countersunk washers so the two halves of the door are pulled together.

Step 1: Install the Panel Adjust Spring Mechanism

  • Loosen the height adjustment locks at the top of the pet panel. This allows the spring mechanism to move freely up and down.

Step 2 Test Fit the Panel in Your Track

  • You want to put the pet door in your track before applying any weather stripping to ensure it fits. If the panel fits well, proceed to the next step. See the FAQs if you have trouble.
  • To insert the panel into the top track, push up against the spring mechanism and swing the bottom of the panel up and over the threshold.
  • Seat the panel on top of the small guide rail in the track.
  • If you can’t quite get it in the track, try swinging in from the outside as the outside track wall may be shorter.

Step 3 Apply the Weatherstripping

  • Once you’re sure the panel fits, remove it from the frame and lay it on its side on the ground.
  • Apply the foam weather-stripping by peeling back the paper and exposing the adhesive.
  • Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides, trim it fit with scissors.
  • Repeat step two to install the panel in your track.

Step 4 Install the Draft Stopper

  • The center post weather seal strip (draft stopper) should be installed on the inside of the home.
  • It can install on either the back edge of the sliding door panel or the leading edge of the stationary panel.
  • This strip prevents air from leaking between the sliding glass door and the stationary panel.
  • Trim with scissors as needed. Clean the edge of your patio door with rubbing alcohol before installing to assure a good seal.

Adjusting Stepover Height

Lock Details

a lock can secure your slider in place

Since you cannot lock your sliding door to your panel pet door, we have provided you with alternative locking methods to secure your home:

Installing the sliding door clamp: This clamp has a screw that tightens by hand to prevent the sliding door from moving beyond the clamp’s placement. For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door’s raised track.

If you aren’t able to use the lock that comes with the panel: A great alternative to locking your sliding glass door is a Charley bar or dowel in the track. Both work off the same concept – they block the slider from opening. When engaged you cannot pull the sliding door away from the pet door panel.


use a charley bar or dowel in the slider track to secure your door

 

Other Installation Options

Semi-Permanent Installation:

You might choose to secure the panel in your track with screws. This can be done by drilling screws at an angle in the top and bottom tracks. We recommend doing this from the outside to minimize damage to the sliding glass door frame. One-way screws will prevent tampering or removal of the panel from the outside.

you can screw your panel into your slider for a more permanent installation

Stationary Panel:

Some stationary sliding door panels can be unfastened and moved over to one side so that you can install the pet door panel between the jamb and stationary panel.

Avoid damaging your sliding glass door by checking that your door can move and that you can reinstall it properly before trying to uninstall the unit.

You will still lose space in your slider to move through, however, you will be able to use your existing sliding door lock to secure your home. Installing your pet door this way is also great in that you already have an alarm system in place.

If your sliding glass door slides on the outside track, using an alternative lock might not be possible, so this allows you to still lock your door.

NOTE: You can do the stationary panel install with the regular spring actuator method – no need to screw it in.

FAQ

What if my panel is slightly too tall?

You can trim up to 3/4" off the spring-loaded adjustment piece at the top. This can be done by removing the adjustment piece with a #2 Phillips head screwdriver and cutting down the flanges. Be careful not to cut too low of you will not be able to put the top back on.

What if my panel is slightly too short?

We offer height extensions that will add 3/4" to the top of the panel that you slide into the channel at the top. These are made from the same aluminum as the panel so you can match the color.

You can also make your extension out of 1" wood (which is 3/4" thick), such as a 1x3 if you need more than 3/4" in height.

Cut it to the same width as the panel and slide it into the channel at the top. Paint the wood to match your frame color. If the extension makes the panel feel unstable, you can secure it with screws.

What if hardware for the locking latch is preventing the door from sealing properly?

You might be able to remove the hardware, as in some cases they are only held in place with a couple of screws.

If you are not able to remove it you can try installing the panel on the stationary side as mentioned on page.

If neither of those choices works, you can try to shim the panel out so that it is even with the face of the lock. Depending on how far it sticks out you might be able to use a thicker foam weatherstripping or a small piece of wood between the panel and wall jamb.

My slider isn't closing evenly against the panel?

Your slider may not be level, which can happen in older houses. In that case, you may be able to adjust the wheels on the slider enough to line it back up. It will depend on your door, but you should be able to adjust a screw near the bottom of the door.

Turning the screw will adjust the wheels slightly. If the slider is level then it could be an issue with the metal height adjustment lock at the top of the panel. You can also use a rubber mallet to tap the curve into a straight line.

If the height adjustment lock is hitting the edge this can mean that the bottom of the panel is going further into the jamb that it can at the top. A gap appears that gets wider as you go down the panel. You can use wood shims or weatherstripping in the jamb to push out the bottom of the panel.

What if the panel is wobbling slightly back and forth?

If your track is wider than 1" you can use small wooden shims or extra weatherstripping to fill in the gap inside the top and bottom tracks. By placing the material inside the tracks you won't be able to see it, but it will stabilize the panel. You might also try semi-permanently installing the pet door.

The slider is on the outside track? How do I lock it?

This can cause an issue if you are trying to lock the door since the clamp lock, Charley bar, or dowel in the track won't really work. In this case, you can use a foot lock. The downside is that you have to drill that into the front end of the stationary panel frame as well as a small hole in the sliding door frame.

Depending on the handle of your slider, you might be able to put a Charley bar between the handle and the edge of the stationary. The slider would then push against the pet door and prevent someone from opening your door.

Alternatively, you can also try installing the pet door between your stationary glass and wall.

There is a large ste-down going out/coming in for the pet?

In this case, you can use a ramp or some small steps to minimize the height of the drop. You'll want the distance between the top of the flap and the ground to allow your pet to go through your flap without ducking or hitting their back.

What if I have an alarm system?

The alarm company might be able to come out and move the sensor for you. So instead of one part being on the door and the other on the jamb, you would end up having one side on the panel that matched up with the one on the sliding door.

As there are many different types of alarm configurations we would recommend that you always consult the alarm security company first to discuss your options.

Videos

The Thermo Panel 3e Patio Panel Pet Door


Adjusting the Stepover Height


Endura Thermo Panel 3e


Installing a Patio Pacific Panel Pet Door


How to Measure Your Door for a Sliding Glass Pet Door


Variable Magnetic Resistance


Adjusting the Stepover Height


The Leaf Blower Test


Endura Flap Dog Doors Durability

FAQ

Does this dog door insert panel work with vinyl sliders?

Yes, the Endura Flap Thermo Panel 3e will work for vinyl sliding glass door so long as the track is at least 1" thick. However, for a snug fit and aesthetic look in your vinyl slider track, we carry the Vinyl Sliding Glass Pet Door as well. Read about the differences between vinyl and aluminum pet door panels here. 

Will a custom-made panel still have a spring-loaded design?

Yes. The Thermo Panel 3e is built with a 3" spring-loaded height adjustment. When you order in one of the custom height ranges, you will be prompted for your track height. The patio panel will be built to a height that is approximately in the middle of this 3" range. For example, if you specify 40", your panel will be built to adjust from about 38" to 41" tall. We also have a sliding door pet door extension for cases where the panel may be slightly too short for their door tracks.

How long will my custom panel take to ship?

Note that the glass units for custom height orders take one to two weeks for delivery from the tempering plant and that we need about a week to schedule the assembly after the glass unit arrives. So delivery will take 2-3 weeks depending upon your location.

How do I measure my door to get the correct height adjustment size?

Measure from the innermost part of the bottom track to the innermost top part of the track. If there is a pencil railing, include that in the measurement because the panel straddles the railing.

Does the Endura Flap Pet Door Thermo Panel 3e require tools for installation?

You'll need a flathead screwdriver to adjust the top piece. Panels that ship in two pieces (sectionals) will need to be assembled with 4 hex screws and a hex wrench, all of which are provided for sectionals. The following panels ship in one piece: Panels under 80 ¼" with a Small, Medium, or Large flap. The following panels ship in two pieces: Panels over 80 ¼" with a Small, Medium, Large, or Extra-Large flap and panels under 80 ¼" with an Extra-Large flap. Shipping a tall and/or wide panel in two pieces saves customers on shipping costs since it can be shipped in a smaller box. 

Can an intruder remove the sliding glass dog door panel from the outside?

No, the thumbscrews are on the inside of the sliding door pet door panel, so once installed, the Endura Flap Panel can't be removed without first loosening the thumbscrews from inside the home.

Is this sliding glass doggie door good in a cold winter climate? I want something effective in our winter months.

Yes, the flap on all of our Endura Flap Pet Door for Sliding Glass Doors has been tested at -40°F and it withstands winds up to 50mph.

What Is the Step-Over?

The step-over is the part of the sliding glass door dog door insert panel under the actual flap opening. Depending on the flap size purchased, the step-over can range from 3" to 7", so you can adjust it to any step-over within that range.

How thick is the sliding door dog door insert panel?

The Endura Flap Sliding Glass Door Thermo Panel 3e is 1" thick.

What locking mechanism can I use for the Thermo Panel 3e?

This  Endura pet door comes with a C-clamp lock. Alternatively, a wooden dowel or Charley Bar can be used for additional security.

Will there be enough room for me to get through after the panel is installed?

The sliding glass door doggie door panel will take up some space in your sliding door track. See the "Overall Panel Width" column in the size chart. This gives the width of the panel, which is the amount of space that will be taken up.

My sliding door track has a triangular guide rail. Will this pet door still work?

Some sliding glass door tracks have a triangle-shaped guide rail instead of a cylindrical pencil rail running along the middle. This pet door panel has an arch along the bottom that is designed to sit on top of a cylindrical pencil rail. Pencil rails are shorter in height than triangular guide rails, which means that the pet door panel would wobble on top of it rather than sitting flush with the rest of the track. To accommodate the pet door panel you will need to build up the sides of the triangular guide rail so that the tip is less than ¼” tall. Please reach out to customer service if you have any questions about this process.

Will this panel work if my sliding glass door has a buried track?

Some sliding glass doors have buried tracks. Since this panel has an arch along the bottom that is designed to sit on top of a pencil rail, it will not be secure in a slider with a buried track without modifications. We recommend securing the panel to the track wall with L brackets or toenailing it to the track wall. Toenailing is the process of fastening the panel to the track by driving a nail at roughly a 45-degree angle into the panel and through the track wall. Please note that these modifications result in a semi-permanent installation. If you needed to remove the panel in the future you would first have to remove the L brackets or nails. Additionally, please note that this process would leave holes in the pet door panel and it would no longer be returnable. Please reach out to customer service to further discuss your options for a buried track.

I have a hurricane patio door. Will this pet door work for me?

Hurricane door track styles vary widely, so they are case-by-case. Please reach out to customer service to discuss your pet door options for your sliding door.

Will this pet door work with Anderson and Pella sliding doors?

Anderson and Pella sliding glass doors have an inner track wall but no outer track wall. Additionally, the pencil rail is on the outer edge of the track rather than in the middle. Since this pet door panel is designed to sit between two track walls and on top of a centered pencil rail, it cannot be installed in Anderson or Pella doors without modifications. We recommend building out your track and using L brackets or toenailing to secure the bottom of the panel to the inner track wall. Building out the track means adding a piece of wood or vinyl that is the same height as the pencil rail to the space next to the pencil rail. This creates a flat surface for the pet door panel to sit on. Next, you will need to secure the panel to the track wall. To do this, you can use L brackets or you can toenail the panel into the track wall. Toenailing is the process of fastening the panel to the track by driving a nail at roughly a 45-degree angle into the panel and through the track wall. Please note that these modifications result in a semi-permanent installation. If you needed to remove the panel in the future you would first have to remove the L brackets or nails. Additionally, please note that this process would leave holes in the pet door panel and it would no longer be returnable. Please reach out to customer service to further discuss this process or different options for an Anderson or Pella sliding door.

Warranty

Endura Flap products have a lifetime warranty against defects in materials and workmanship under standard regular use. Damage caused by not using the product as intended, improper installation, and chewing is not covered under this warranty.

Customer Reviews

Customer Reviews
4.5 Based on 307 Reviews
5 ★
71% 
219
4 ★
18% 
56
3 ★
5% 
14
2 ★
4% 
11
1 ★
2% 
7
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Filter Reviews:
K
09/02/2014
Kathy

Door is great

The door is very well made and sturdy. I live in a very hot climate in the summer and the seal on the flap is good. It was pretty easy to install, and there is no movement when the big dog goes through it. There was a little package of liver dog treats included in my box. I fed several to my big dog and she got terrible diarrhea I think from those, she is fine but it was pretty bad, so avoid the enclosed treats if you get them.

G
09/04/2014
gedub

Nice Door

This door is well make and works good on my slider

G
10/19/2014
Geno

Ginger now loves the door.

The Endura Flap door is an excellent product of very high quality. The installation was quick and easy. My dog Ginger did not want to use it at first, but she had no issues once I removed the three magnets for training purposes. I left the magnets out for about a month, then added them back one at a time at a one week interval. (They can be removed and reinstalled easily.) Ginger now has no issues using the door, and we are very pleased with our purchase.

JR
11/06/2014
Jeff R.

Worth The Money

The construction is solid, this isn't a cheapo door, fittings are cut well and everything works as advertised. The supplied moldings cut down on heat loss at the seams and the doggie door is just the right size. I appreciated getting the right model, size, and color during shipping, somebody was paying attention. And the door was packed well and shipped with no damage. Don't buy the cheapo versions a the Pet Mart's, this is a quality door.

4B
11/07/2014
4 B.

Awesome door!!

This is the best pet door! We have not hit our coldest temperatures yet this year to know if the door keeps the cold out well but the door is above what we expected. My husband had to make a few revisions to get the door in place but not because of the pet door, it was due to our slider. Once in place the dogs started using it immediately. We have a 120# Bernese Mountain Dog and he fits through it just fine. Door is very sturdy and the magnet flap is very secure and shuts tightly after the dogs have gone through. We hesitated about getting a dog door for years, but our two older dogs should not be braving the elements anymore than they have to so we bought this door based on the reviews. The door is above and beyond what we expected- I'm so glad we bought it!!

Endura Flap Thermo Panel 3e

White / Small / 74.75" - 77.75" Edit

Endura Flap Thermo Panel 3e

Flap Dimensions:

6"w x 11"h

The entry way your dog goes through.

Overall Panel Width

10 3/16"

How wide your panel is.
flap dimensions
epanel width
step over height

Step-Over Height

3” - 5”

The distance from the bottom of the panel to the bottom of your flap.

Flap Dimensions:

8"w x 15"h

The entry way your dog goes through.

Overall Panel Width

12 1/4"

How wide your panel is.
flap dimensions
epanel width
step over height

Step-Over Height

3” - 5”

The distance from the bottom of the panel to the bottom of your flap.

Flap Dimensions:

10"w x 19"h

The entry way your dog goes through.

Overall Panel Width

14 1/4"

How wide your panel is.
flap dimensions
epanel width
step over height

Step-Over Height

3” - 7”

The distance from the bottom of the panel to the bottom of your flap.

Flap Dimensions:

12"w x 23"h

The entry way your dog goes through.

Overall Panel Width

16 5/16”

How wide your panel is.
flap dimensions
epanel width
step over height

Step-Over Height

3” - 7”

The distance from the bottom of the panel to the bottom of your flap.
Flap SizeFlap DimensionStep Over RangeOverall Panel WidthRecommended Pet Height
Small6" w x 11" h3" - 5"10-3/16"9" - 15"
Medium8" w x 15" h3" - 5"12-1/4"9" - 21"
Large10" w x 19" h3" - 7" (ships at 5")14-1/4"9" - 27"
Extra Large12" w x 23" h3" - 7" (ships at 5")16-5/16"9" - 34"

Note: Endura Flap is not recommended for kittens or very small dogs.

Important Information about Custom Heights

Custom Height Minimum & Maximum Heights
ModelMinimumMaximum
Small 35"100"
Medium 42"107"
Large 48"117"
Extra Large 46"123"


Custom orders are final sale once built. They are essential in two situations:

While most sliding glass door track heights are in the three standard height ranges offered, some are not. In those cases, we can build a Thermo Panel 3e in a custom height to fit your specific dimension. 

The second situation is when you have a side-sliding window. A sliding window is essentially a miniature sliding glass door, and you can install a custom height panel, provided the window track is at least 1" wide.

Find The Best Pet Door Size For My Pet

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A

Pet Height: inches

B

Pet Width: inches

Please fill the above fields.

Frame Material

Architectural Extruded Aluminum

Track Width Minimum

1"

Flap Thickness

7/8"

Warranty Period

Lifetime

Return Period

90 days (except for custom sizes)

return period

90 days (except for custom sizes)

Locking Cover Material

Heavy-Duty Molded ABS

Climate Suitability

Severe-4 Season

House Locking Method

C-Clamp Lock

Flap Design

Single, Flexible, Insulated Flap

Ability to Lock Flap

Separate Locking Cover-Loads from Top

Can Be Installed In

Dual Pane Glass Sliding Glass Door, Single Pane Glass Sliding Glass Door, Vinyl-Framed Sliding Glass Door, Sideways Sliding Windows

Custom Heights Available

Yes

Sealing Value

Very High

Wind Resistance

Very High

Replacement Flaps Available

Yes

Insulation Value

High

track width minimum

1"

warranty period

Lifetime

Installation Instructions

Click to view the Two-Piece Thermo Panel 3e Installation Instructions.

Installation icon Printable Version
Installation icon Difficulty Easy
Installation icon Steps 06
Installation icon Time Required 0.5 hours
Installation icon Sections 02
Installation icon Flags 02

Parts

  • Panel Pet Door
  • Foam Weather Strip
  • Center Post Weather Seal Draft Stopper
  • Sliding Door C-Clamp Lock
  • Screwdriver

Tools

  • Flathead Screwdriver

Please read instructions & notes thoroughly before installation.

One-Piece Panel (Panels Shorter Than 80")

Step 1: Step Over Adjust the Step Over (Optional)

  • The Endura aluminum sliding door panel has a patented Adjustable Step-Over feature which allows you to adjust the height of the flap to the most comfortable fit for your pet.
  • The top of the flap should be positioned to be at least 1” above the top of the pet’s shoulder.
  • If the factory setting is not suitable, please adjust it before proceeding. If the current setting is suitable, proceed to the “Installation Instructions” section.

Step 2 Adjust the Screws

  • Lay the entire panel on a flat surface.
  • Using a #2 flat head screwdriver, remove the bottom side-screws and loosen the upper side-screws. Screws were tightly installed to hold the panel together during shipping; a power tool* is recommended.
  • If you do not have a flat head drill bit skinny enough to fit, let us know and we’ll send you one for free.

Step 3 Adjust the Spacers

  • Once the bottom screws have been removed and the upper side-screws loosened, the Pet Door Assembly and spacers can be removed by sliding the sections down and out of the panel.

Step 4 Replace the Spacers

  • Replace the spacers and the Pet Door Assembly by sliding them back in a different order to achieve the desired height. You can move the spacer below and above the flap to raise or lower the flap height.
  • The order of the pieces is important! The piece on the bottom needs to always be at the bottom, as that is where the screws attach.
  • Make sure that the locking cover side of the flap frame is on the same side as the height adjustment locks.

Step 5 Tighten the Screws

  • When finished, replace the bottom side-screws and tighten the next upper-side screws.
  • A lower step-over height is easier for pets to navigate. However, if the top of the flap is low enough that the pet needs to crouch to get through their pet door, they can injure themselves and possibly cause the pet door to malfunction. If your pet door does not sit at a comfortable height for your pet, you may need a larger flap size.

Step 1: Install the Panel Spring Mechanism

  • Loosen the height adjustment locks at the top of the pet panel with the screwdriver. This allows the spring mechanism to move freely up and down.

Step 2 Test Fit the Panel in Your Track

  • You want to put the pet door in your track before applying any weather stripping to ensure it fits. If the panel fits well, proceed to the next step. See the FAQs if you have trouble.
  • To insert the panel into the top track, push up against the spring mechanism and swing the bottom of the panel up and over the threshold.
  • Seat the panel on top of the small guide rail in the track.
  • If you can’t quite get it in the track, try swinging in from the outside as the outside track wall may be shorter.

Step 3 Apply the Weatherstripping

  • Once you’re sure the panel fits, remove it from the frame and lay it on its side on the ground.
  • Apply the foam weather-stripping by peeling back the paper and exposing the adhesive.
  • Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides, trim it fit with scissors.

Step 4 Install the Draft Stopper

  • The center post weather seal strip (draft stopper) should be installed on the inside of the home.
  • It can install on either the back edge of the sliding door panel or the leading edge of the stationary panel.
  • This strip prevents air from leaking between the sliding glass door and the stationary panel.
  • Trim with scissors as needed. Clean the edge of your patio door with rubbing alcohol before installing to assure a good seal.
  • Repeat step two to install the panel in your track.

Click to view the One-Piece Thermo Panel 3e Installation Instructions.

Installation icon Printable Version
Installation icon Difficulty Easy
Installation icon Steps 06
Installation icon Time Required 0.5 hours
Installation icon Sections 03
Installation icon Flags 02

Parts

  • Top Glass Panel Section
  • Bottom Flap Section
  • Foam Weather Strip
  • Center Post Weather Seal Draft Stopper
  • 4 Flathead Screws
  • Flathead Screwdriver
  • Screwdriver for Adjustment Locks
  • Sliding Door C-Clamp Lock

Tools

  • Flathead Screwdriver

Please read instructions & notes thoroughly before installation.

Two-Piece Panel (Panels 80" and Taller)

Step 1: Step Over Adjust Step Over Height (Optional)

  • The Endura aluminum sliding door panel has a patented Adjustable Step-Over feature which allows you to adjust the height of the flap to the most comfortable fit for your pet.
  • The top of the flap should be positioned to be at least 1” above the top of the pet’s shoulder.
  • If the factory setting is not suitable, please adjust it before proceeding. If the current setting is suitable, proceed to the “Installation Instructions” section.

Step 2 Rearrange the Pieces

  • Simply slide the pieces up and out from the bottom half of your panel to rearrange.
  • Loosen a bottom screw if the pieces are too snug to move.

Step 3 Reconnect the Pieces

  • Replace the spacers and the Pet Door Assembly by sliding them back in a different order to achieve the desired height.
  • You can move the spacer below or above the flap to raise or lower the flap height.

Step 4 Screw the Pieces Together

  • The order of the pieces is important! The piece on the bottom needs to always be at the bottom, as that is where the screws attach. You can now assemble the patio panel!

Step 1: Connect the Sections Align the Connectors

  • Align the aluminum connectors extending from the bottom flap panel section with the top glass panel section.
  • Press the aluminum connectors into the holes at the bottom of the top glass panel section.
  • Ensure locking cover & height adjustment locks are on the same side!

Step 2 Tap the Pieces Together

  • Gently tap the bottom surface of the panel against the ground to completely insert the connectors.
  • Protect hard surfaces to prevent scratching.
  • The components of the panel are designed to slide together very tightly.

Step 3 Secure the Sections

  • Fasten the two panels together using the four flathead screws and countersunk washers found in the panel packaging.
  • Use the included flathead screwdriver to tighten all four flathead screws and countersunk washers so the two halves of the door are pulled together.

Step 1: Install the Panel Adjust Spring Mechanism

  • Loosen the height adjustment locks at the top of the pet panel. This allows the spring mechanism to move freely up and down.

Step 2 Test Fit the Panel in Your Track

  • You want to put the pet door in your track before applying any weather stripping to ensure it fits. If the panel fits well, proceed to the next step. See the FAQs if you have trouble.
  • To insert the panel into the top track, push up against the spring mechanism and swing the bottom of the panel up and over the threshold.
  • Seat the panel on top of the small guide rail in the track.
  • If you can’t quite get it in the track, try swinging in from the outside as the outside track wall may be shorter.

Step 3 Apply the Weatherstripping

  • Once you’re sure the panel fits, remove it from the frame and lay it on its side on the ground.
  • Apply the foam weather-stripping by peeling back the paper and exposing the adhesive.
  • Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides, trim it fit with scissors.
  • Repeat step two to install the panel in your track.

Step 4 Install the Draft Stopper

  • The center post weather seal strip (draft stopper) should be installed on the inside of the home.
  • It can install on either the back edge of the sliding door panel or the leading edge of the stationary panel.
  • This strip prevents air from leaking between the sliding glass door and the stationary panel.
  • Trim with scissors as needed. Clean the edge of your patio door with rubbing alcohol before installing to assure a good seal.

Adjusting Stepover Height

Lock Details

a lock can secure your slider in place

Since you cannot lock your sliding door to your panel pet door, we have provided you with alternative locking methods to secure your home:

Installing the sliding door clamp: This clamp has a screw that tightens by hand to prevent the sliding door from moving beyond the clamp’s placement. For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door’s raised track.

If you aren’t able to use the lock that comes with the panel: A great alternative to locking your sliding glass door is a Charley bar or dowel in the track. Both work off the same concept – they block the slider from opening. When engaged you cannot pull the sliding door away from the pet door panel.


use a charley bar or dowel in the slider track to secure your door

 

Other Installation Options

Semi-Permanent Installation:

You might choose to secure the panel in your track with screws. This can be done by drilling screws at an angle in the top and bottom tracks. We recommend doing this from the outside to minimize damage to the sliding glass door frame. One-way screws will prevent tampering or removal of the panel from the outside.

you can screw your panel into your slider for a more permanent installation

Stationary Panel:

Some stationary sliding door panels can be unfastened and moved over to one side so that you can install the pet door panel between the jamb and stationary panel.

Avoid damaging your sliding glass door by checking that your door can move and that you can reinstall it properly before trying to uninstall the unit.

You will still lose space in your slider to move through, however, you will be able to use your existing sliding door lock to secure your home. Installing your pet door this way is also great in that you already have an alarm system in place.

If your sliding glass door slides on the outside track, using an alternative lock might not be possible, so this allows you to still lock your door.

NOTE: You can do the stationary panel install with the regular spring actuator method – no need to screw it in.

FAQ

What if my panel is slightly too tall?

You can trim up to 3/4" off the spring-loaded adjustment piece at the top. This can be done by removing the adjustment piece with a #2 Phillips head screwdriver and cutting down the flanges. Be careful not to cut too low of you will not be able to put the top back on.

What if my panel is slightly too short?

We offer height extensions that will add 3/4" to the top of the panel that you slide into the channel at the top. These are made from the same aluminum as the panel so you can match the color.

You can also make your extension out of 1" wood (which is 3/4" thick), such as a 1x3 if you need more than 3/4" in height.

Cut it to the same width as the panel and slide it into the channel at the top. Paint the wood to match your frame color. If the extension makes the panel feel unstable, you can secure it with screws.

What if hardware for the locking latch is preventing the door from sealing properly?

You might be able to remove the hardware, as in some cases they are only held in place with a couple of screws.

If you are not able to remove it you can try installing the panel on the stationary side as mentioned on page.

If neither of those choices works, you can try to shim the panel out so that it is even with the face of the lock. Depending on how far it sticks out you might be able to use a thicker foam weatherstripping or a small piece of wood between the panel and wall jamb.

My slider isn't closing evenly against the panel?

Your slider may not be level, which can happen in older houses. In that case, you may be able to adjust the wheels on the slider enough to line it back up. It will depend on your door, but you should be able to adjust a screw near the bottom of the door.

Turning the screw will adjust the wheels slightly. If the slider is level then it could be an issue with the metal height adjustment lock at the top of the panel. You can also use a rubber mallet to tap the curve into a straight line.

If the height adjustment lock is hitting the edge this can mean that the bottom of the panel is going further into the jamb that it can at the top. A gap appears that gets wider as you go down the panel. You can use wood shims or weatherstripping in the jamb to push out the bottom of the panel.

What if the panel is wobbling slightly back and forth?

If your track is wider than 1" you can use small wooden shims or extra weatherstripping to fill in the gap inside the top and bottom tracks. By placing the material inside the tracks you won't be able to see it, but it will stabilize the panel. You might also try semi-permanently installing the pet door.

The slider is on the outside track? How do I lock it?

This can cause an issue if you are trying to lock the door since the clamp lock, Charley bar, or dowel in the track won't really work. In this case, you can use a foot lock. The downside is that you have to drill that into the front end of the stationary panel frame as well as a small hole in the sliding door frame.

Depending on the handle of your slider, you might be able to put a Charley bar between the handle and the edge of the stationary. The slider would then push against the pet door and prevent someone from opening your door.

Alternatively, you can also try installing the pet door between your stationary glass and wall.

There is a large ste-down going out/coming in for the pet?

In this case, you can use a ramp or some small steps to minimize the height of the drop. You'll want the distance between the top of the flap and the ground to allow your pet to go through your flap without ducking or hitting their back.

What if I have an alarm system?

The alarm company might be able to come out and move the sensor for you. So instead of one part being on the door and the other on the jamb, you would end up having one side on the panel that matched up with the one on the sliding door.

As there are many different types of alarm configurations we would recommend that you always consult the alarm security company first to discuss your options.

Videos

The Thermo Panel 3e Patio Panel Pet Door


Adjusting the Stepover Height


Endura Thermo Panel 3e


Installing a Patio Pacific Panel Pet Door


How to Measure Your Door for a Sliding Glass Pet Door


Variable Magnetic Resistance


Adjusting the Stepover Height


The Leaf Blower Test


Endura Flap Dog Doors Durability

FAQ

Does this dog door insert panel work with vinyl sliders?

Yes, the Endura Flap Thermo Panel 3e will work for vinyl sliding glass door so long as the track is at least 1" thick. However, for a snug fit and aesthetic look in your vinyl slider track, we carry the Vinyl Sliding Glass Pet Door as well. Read about the differences between vinyl and aluminum pet door panels here. 

Will a custom-made panel still have a spring-loaded design?

Yes. The Thermo Panel 3e is built with a 3" spring-loaded height adjustment. When you order in one of the custom height ranges, you will be prompted for your track height. The patio panel will be built to a height that is approximately in the middle of this 3" range. For example, if you specify 40", your panel will be built to adjust from about 38" to 41" tall. We also have a sliding door pet door extension for cases where the panel may be slightly too short for their door tracks.

How long will my custom panel take to ship?

Note that the glass units for custom height orders take one to two weeks for delivery from the tempering plant and that we need about a week to schedule the assembly after the glass unit arrives. So delivery will take 2-3 weeks depending upon your location.

How do I measure my door to get the correct height adjustment size?

Measure from the innermost part of the bottom track to the innermost top part of the track. If there is a pencil railing, include that in the measurement because the panel straddles the railing.

Does the Endura Flap Pet Door Thermo Panel 3e require tools for installation?

You'll need a flathead screwdriver to adjust the top piece. Panels that ship in two pieces (sectionals) will need to be assembled with 4 hex screws and a hex wrench, all of which are provided for sectionals. The following panels ship in one piece: Panels under 80 ¼" with a Small, Medium, or Large flap. The following panels ship in two pieces: Panels over 80 ¼" with a Small, Medium, Large, or Extra-Large flap and panels under 80 ¼" with an Extra-Large flap. Shipping a tall and/or wide panel in two pieces saves customers on shipping costs since it can be shipped in a smaller box. 

Can an intruder remove the sliding glass dog door panel from the outside?

No, the thumbscrews are on the inside of the sliding door pet door panel, so once installed, the Endura Flap Panel can't be removed without first loosening the thumbscrews from inside the home.

Is this sliding glass doggie door good in a cold winter climate? I want something effective in our winter months.

Yes, the flap on all of our Endura Flap Pet Door for Sliding Glass Doors has been tested at -40°F and it withstands winds up to 50mph.

What Is the Step-Over?

The step-over is the part of the sliding glass door dog door insert panel under the actual flap opening. Depending on the flap size purchased, the step-over can range from 3" to 7", so you can adjust it to any step-over within that range.

How thick is the sliding door dog door insert panel?

The Endura Flap Sliding Glass Door Thermo Panel 3e is 1" thick.

What locking mechanism can I use for the Thermo Panel 3e?

This  Endura pet door comes with a C-clamp lock. Alternatively, a wooden dowel or Charley Bar can be used for additional security.

Will there be enough room for me to get through after the panel is installed?

The sliding glass door doggie door panel will take up some space in your sliding door track. See the "Overall Panel Width" column in the size chart. This gives the width of the panel, which is the amount of space that will be taken up.

My sliding door track has a triangular guide rail. Will this pet door still work?

Some sliding glass door tracks have a triangle-shaped guide rail instead of a cylindrical pencil rail running along the middle. This pet door panel has an arch along the bottom that is designed to sit on top of a cylindrical pencil rail. Pencil rails are shorter in height than triangular guide rails, which means that the pet door panel would wobble on top of it rather than sitting flush with the rest of the track. To accommodate the pet door panel you will need to build up the sides of the triangular guide rail so that the tip is less than ¼” tall. Please reach out to customer service if you have any questions about this process.

Will this panel work if my sliding glass door has a buried track?

Some sliding glass doors have buried tracks. Since this panel has an arch along the bottom that is designed to sit on top of a pencil rail, it will not be secure in a slider with a buried track without modifications. We recommend securing the panel to the track wall with L brackets or toenailing it to the track wall. Toenailing is the process of fastening the panel to the track by driving a nail at roughly a 45-degree angle into the panel and through the track wall. Please note that these modifications result in a semi-permanent installation. If you needed to remove the panel in the future you would first have to remove the L brackets or nails. Additionally, please note that this process would leave holes in the pet door panel and it would no longer be returnable. Please reach out to customer service to further discuss your options for a buried track.

I have a hurricane patio door. Will this pet door work for me?

Hurricane door track styles vary widely, so they are case-by-case. Please reach out to customer service to discuss your pet door options for your sliding door.

Will this pet door work with Anderson and Pella sliding doors?

Anderson and Pella sliding glass doors have an inner track wall but no outer track wall. Additionally, the pencil rail is on the outer edge of the track rather than in the middle. Since this pet door panel is designed to sit between two track walls and on top of a centered pencil rail, it cannot be installed in Anderson or Pella doors without modifications. We recommend building out your track and using L brackets or toenailing to secure the bottom of the panel to the inner track wall. Building out the track means adding a piece of wood or vinyl that is the same height as the pencil rail to the space next to the pencil rail. This creates a flat surface for the pet door panel to sit on. Next, you will need to secure the panel to the track wall. To do this, you can use L brackets or you can toenail the panel into the track wall. Toenailing is the process of fastening the panel to the track by driving a nail at roughly a 45-degree angle into the panel and through the track wall. Please note that these modifications result in a semi-permanent installation. If you needed to remove the panel in the future you would first have to remove the L brackets or nails. Additionally, please note that this process would leave holes in the pet door panel and it would no longer be returnable. Please reach out to customer service to further discuss this process or different options for an Anderson or Pella sliding door.

Warranty

Endura Flap products have a lifetime warranty against defects in materials and workmanship under standard regular use. Damage caused by not using the product as intended, improper installation, and chewing is not covered under this warranty.

Customer Reviews

Customer Reviews
4.5 Based on 307 Reviews
5 ★
71% 
219
4 ★
18% 
56
3 ★
5% 
14
2 ★
4% 
11
1 ★
2% 
7
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Filter Reviews:
K
09/02/2014
Kathy

Door is great

The door is very well made and sturdy. I live in a very hot climate in the summer and the seal on the flap is good. It was pretty easy to install, and there is no movement when the big dog goes through it. There was a little package of liver dog treats included in my box. I fed several to my big dog and she got terrible diarrhea I think from those, she is fine but it was pretty bad, so avoid the enclosed treats if you get them.

G
09/04/2014
gedub

Nice Door

This door is well make and works good on my slider

G
10/19/2014
Geno

Ginger now loves the door.

The Endura Flap door is an excellent product of very high quality. The installation was quick and easy. My dog Ginger did not want to use it at first, but she had no issues once I removed the three magnets for training purposes. I left the magnets out for about a month, then added them back one at a time at a one week interval. (They can be removed and reinstalled easily.) Ginger now has no issues using the door, and we are very pleased with our purchase.

JR
11/06/2014
Jeff R.

Worth The Money

The construction is solid, this isn't a cheapo door, fittings are cut well and everything works as advertised. The supplied moldings cut down on heat loss at the seams and the doggie door is just the right size. I appreciated getting the right model, size, and color during shipping, somebody was paying attention. And the door was packed well and shipped with no damage. Don't buy the cheapo versions a the Pet Mart's, this is a quality door.

4B
11/07/2014
4 B.

Awesome door!!

This is the best pet door! We have not hit our coldest temperatures yet this year to know if the door keeps the cold out well but the door is above what we expected. My husband had to make a few revisions to get the door in place but not because of the pet door, it was due to our slider. Once in place the dogs started using it immediately. We have a 120# Bernese Mountain Dog and he fits through it just fine. Door is very sturdy and the magnet flap is very secure and shuts tightly after the dogs have gone through. We hesitated about getting a dog door for years, but our two older dogs should not be braving the elements anymore than they have to so we bought this door based on the reviews. The door is above and beyond what we expected- I'm so glad we bought it!!

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