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Endura Flap Dual Pane Thermo Panel 3e

12 reviews

Endura Flap Dual Pane Thermo Panel 3e

12 reviews
Regular price
$619.99
Sale price
$619.99
Unit price
per 
White
Dark Bronze/Black
Brushed Aluminum

  • Aluminum framed, insulated dog door for sliding glass doors with widths from 11.25 -17.25 inches (see size chart below) 
  • Dual-pane, Low-E glass for maximum energy efficiency
  • Energy-efficient pet door flap resists extreme weather and winds up to 50mph 
  • Semi-permanent installation not required, perfect for renters or vacation homes
  • Adjustable height to fit all sliding glass door models with tracks at least 1" thick 
  • Includes a durable locking cover to block access when needed 
  • Need a different height? Check out our custom sizing options
Superior Weather Resistance Superior Weather Resistance
Great for Renters Great for Renters
Easy, Tool-Free Installation Easy, Tool-Free Installation

Product Details

  • Insulated dog door for sliding glass door with dual-pane, Low-e glass and an energy-efficient dog door flap that has magnets on all sides to shield against the cold or heat
  • Excellent sealing from bellows on the sides of the Endura Flap dog door that expand and contract in response to the weather
  • Withstands extreme temperatures from -40℉ to 110
  • Easy installation with the spring-loaded top
  • Longer-lasting flap rotates on a rod rather than screwed into the frame to avoid extreme wear and tear
  • PVC Flap (rather than Vinyl) will not warp or yellow in direct heat
  • Fits into most sliding glass doors including aluminum and vinyl frames with a track width minimum of 1"
  • Secure locking cover can be placed over the pet door to ensure that intruders will not be able to come in through the dog door
  • Locks provided to secure your sliding glass pet door to your sliding patio door frame
  • 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
  • Option to add or decrease magnet strength for training or to increase the Endura Flap pet door’s already significant wind resistance

    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.

    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

    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

    Tools

    • None

    Please read instructions & notes thoroughly before installation.

    One-Piece Panel

    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 Philips 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 Phillips 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. 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.
    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
    • Sliding Door C-Clamp Lock

    Tools

    • None

    Please read instructions & notes thoroughly before installation.

    Two-Piece Panel

    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 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.

    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?

    Endura Flap sliding glass dog doors under 80 ¼" do not require tools, making them one of the best dog doors for rental homes. Doggy door panels above this height will be shipped in two pieces and require some tools for installation. The sectionals will need to be assembled with 4 hex screws and a hex wrench, all of which are provided.

    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. The dual-pane glass is excellent for keeping your home insualted. 

    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

    Endura Flap Dual Pane Thermo Panel 3e

    White / Small / 74.75" - 77.75" Edit

    endura thermo panel 3e pet door

    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.

    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

    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

    Tools

    • None

    Please read instructions & notes thoroughly before installation.

    One-Piece Panel

    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 Philips 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 Phillips 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. 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.
    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
    • Sliding Door C-Clamp Lock

    Tools

    • None

    Please read instructions & notes thoroughly before installation.

    Two-Piece Panel

    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 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.

    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?

    Endura Flap sliding glass dog doors under 80 ¼" do not require tools, making them one of the best dog doors for rental homes. Doggy door panels above this height will be shipped in two pieces and require some tools for installation. The sectionals will need to be assembled with 4 hex screws and a hex wrench, all of which are provided.

    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. The dual-pane glass is excellent for keeping your home insualted. 

    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.

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