Endura Flap Quick Panel 3
5
The Quick Panel 3 is a Lite Version of the Thermo-Panel 3e: Identical but uses single pane glass for a lighter product weight.
- The perfect choice for temporary or seasonal installation
- Easy to install and doesn't require semi-permanent installation
- Adjustable heights to fit any sliding glass door with a track at least 1" thick
- Insulating flap keeps hot and cold weather out of your home
- Lighter weight Aluminum framed panel can be installed and removed quickly
- Durable locking cover included to block access to the flap




Product Details
-
Insulating flap with a complete magnetic seal resists winds up to 50mph
- 3/16" single pane, tempered glass is lightweight for easy installation but 50% thicker than other single pane panels
- Polyolefin Polymer Flap withstands extreme temperatures from -40℉ to 110℉
- Fits into sliding glass doors with a track width of at least 1"
- Custom heights are available upon request for the perfect fit
- Sturdy locking cover can be placed over the pet door to block access when needed and secure your home
- Adjustable step-over allows you to customize the height between the pet door and the bottom of the panel to accommodate all pets
- C-Clamp lock included to secure your dog door panel against your sliding glass door
- Flexible flap swings on a rod at the top to avoid cracking and flexing
- Four flap sizes available to accommodate cats to large breed dogs
- 100% manufactured in the U.S.
Important Information about Custom Heights
Custom orders are final sale. 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 Quick Panel 3 in a custom height to fit your specific dimension.
The second situation is when you have a sideways sliding window. A sliding window is essentially a miniature sliding glass door, and you can install a custom height undersize Quick Panel 3 to fit, provided the window track width is at least 1" thick.
Custom Height Minimum & Maximum Heights | ||
---|---|---|
Model | Minimum | Maximum |
Small | 35" | 100" |
Medium | 42" | 107" |
Large | 48" | 117" |
Extra Large | 46" | 123" |
Find The Best Pet Door Size For My Pet

A
Pet Height: inches
B
Pet Width: inches
Size Chart


Flap Size | Flap Dimension | Step Over Range | Overall Panel Width | Recommended Pet Height |
---|---|---|---|---|
Small | 6" w x 11" h | 3" - 5" | 10-3/16" | 9" - 15" |
Medium | 8" w x 15" h | 3" - 5" | 12-1/4" | 9" - 19" |
Large | 10" w x 19" h | 3" - 7" (ships at 5") | 14-1/4" | 9" - 23" |
Extra Large | 12" w x 23" h | 3" - 7" (ships at 5") | 16-5/16" | 9" - 29" |
Height Options:
- Short: 74 3/4" - 77 3/4"
- Regular: 77 1/4" - 80 1/4"
- Tall: 93 1/4" - 96 1/4" (additional cost)
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 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.
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.
Step 5 Tighten the Screws
- When finished, replace the bottom side-screws and tighten the next upper-side screws.
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

- 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.
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.
- 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.
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 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

- 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.
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.
- 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

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.

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.

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
Adjusting the Stepover Height
How to Measure Your Door for a Sliding Glass Pet Door
How to Install the Endura Quick Panel 3
The Quick Panel 3 Patio Panel Pet Door
Variable Magnetic Resistance
Adjusting the Step Over Height
The Leaf Blower Test
FAQ
Does this panel work with vinyl sliders? Yes, the Endura Flap Quick Panel 3 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. |
How do custom orders work? The Quick Panel 3 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. |
How long do custom orders take to ship? Custom orders cannot be resold. Therefore, they are final sale once built. 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, even though your custom order must be pre-paid, delivery will take 2-3 weeks depending upon your location. (Stock items are not paid for until they are shipped). |
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 Quick Panel 3 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. 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 panel from the outside? No, the thumbscrews are on the inside of the panel, so once installed, the Endura Flap Panel can't be removed without first loosening the thumbscrews from inside the home. |
Is this door good in a cold winter climate? I want something effective in our winter months. Yes, the Endura Flap 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 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 panel? The Quick Panel is 1" thick. |
What locking mechanism can I use for the Quick Panel 3? This 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 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. |
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

Find The Best Pet Door Size For My Pet

A
Pet Height: inches
B
Pet Width: inches


Flap Size | Flap Dimension | Step Over Range | Overall Panel Width | Recommended Pet Height |
---|---|---|---|---|
Small | 6" w x 11" h | 3" - 5" | 10-3/16" | 9" - 15" |
Medium | 8" w x 15" h | 3" - 5" | 12-1/4" | 9" - 19" |
Large | 10" w x 19" h | 3" - 7" (ships at 5") | 14-1/4" | 9" - 23" |
Extra Large | 12" w x 23" h | 3" - 7" (ships at 5") | 16-5/16" | 9" - 29" |
Height Options:
- Short: 74 3/4" - 77 3/4"
- Regular: 77 1/4" - 80 1/4"
- Tall: 93 1/4" - 96 1/4" (additional cost)
Installation Instructions
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 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.
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.
Step 5 Tighten the Screws
- When finished, replace the bottom side-screws and tighten the next upper-side screws.
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

- 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.
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.
- 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.
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 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

- 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.
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.
- 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

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.

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.

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
Adjusting the Stepover Height
How to Measure Your Door for a Sliding Glass Pet Door
How to Install the Endura Quick Panel 3
The Quick Panel 3 Patio Panel Pet Door
Variable Magnetic Resistance
Adjusting the Step Over Height
The Leaf Blower Test
FAQ
Does this panel work with vinyl sliders? Yes, the Endura Flap Quick Panel 3 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. |
How do custom orders work? The Quick Panel 3 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. |
How long do custom orders take to ship? Custom orders cannot be resold. Therefore, they are final sale once built. 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, even though your custom order must be pre-paid, delivery will take 2-3 weeks depending upon your location. (Stock items are not paid for until they are shipped). |
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 Quick Panel 3 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. 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 panel from the outside? No, the thumbscrews are on the inside of the panel, so once installed, the Endura Flap Panel can't be removed without first loosening the thumbscrews from inside the home. |
Is this door good in a cold winter climate? I want something effective in our winter months. Yes, the Endura Flap 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 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 panel? The Quick Panel is 1" thick. |
What locking mechanism can I use for the Quick Panel 3? This 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 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. |