Find The Best Pet Door Size For My Pet

Where To Install:
A
inchesB
inchesPlease fill the above fields.
-
Window
9-15
6
Small
https://enduraflap.com/products/horizontal-window-cat-door?variant=39518503370831
-
Door
8-14
6
Small
https://enduraflap.com/products/double-flap-door?variant=43778127364326
-
Door
8-21
8
Medium
https://enduraflap.com/products/double-flap-door?variant=43778127560934
-
Door
8-27
10
Large
https://enduraflap.com/products/double-flap-door?variant=43778127757542
-
Door
8-34
12
Extra Large
https://enduraflap.com/products/double-flap-door?variant=43778127954150
-
Wall
8-14
6
Small
https://enduraflap.com/products/double-flap-wall?variant=30371900096591
-
Wall
8-21
8
Medium
https://enduraflap.com/products/double-flap-wall?variant=30371900194895
-
Wall
8-27
10
Large
https://enduraflap.com/products/double-flap-wall?variant=30371900293199
-
Wall
8-34
12
Extra Large
https://enduraflap.com/products/double-flap-wall?variant=30371900391503
-
Door
8-16
6
Small
https://enduraflap.com/products/kennel?variant=31373400473679
-
Door
8-22
8
Medium
https://enduraflap.com/products/kennel?variant=31373400506447
-
Door
8-28
10
Large
https://enduraflap.com/products/kennel?variant=31373400539215
-
Door
8-36
12
Extra Large
https://enduraflap.com/products/kennel?variant=31373400571983
-
Sliding Glass Door
8-14
6
Small
https://enduraflap.com/products/severe-weather-vinyl?variant=39518506156111
-
Sliding Glass Door
8-21
8
Medium
https://enduraflap.com/products/severe-weather-vinyl?variant=39518506221647
-
Sliding Glass Door
8-27
10
Large
https://enduraflap.com/products/severe-weather-vinyl?variant=39518506287183
-
Sliding Glass Door
8-34
12
Extra Large
https://enduraflap.com/products/severe-weather-vinyl?variant=39518506352719
-
Door
9-16
6
Small
https://enduraflap.com/products/single-flap-door?variant=43778122416358
-
Door
9-22
8
Medium
https://enduraflap.com/products/single-flap-door?variant=43778122612966
-
Door
9-28
10
Large
https://enduraflap.com/products/single-flap-door?variant=43778122809574
-
Door
9-36
12
Extra Large
https://enduraflap.com/products/single-flap-door?variant=43778123006182
-
Wall
9-16
6
Small
https://enduraflap.com/products/single-flap-wall?variant=30337359282255
-
Wall
9-22
8
Medium
https://enduraflap.com/products/single-flap-wall?variant=30345914679375
-
Wall
9-28
10
Large
https://enduraflap.com/products/single-flap-wall?variant=30345914777679
-
Wall
9-36
12
Extra Large
https://enduraflap.com/products/single-flap-wall?variant=30345914875983
-
Sliding Glass Door
9-15
6
Small
https://enduraflap.com/products/thermo-panel-3e?variant=39518500913231
-
Sliding Glass Door
9-21
8
Medium
https://enduraflap.com/products/thermo-panel-3e?variant=39518501109839
-
Sliding Glass Door
9-27
10
Large
https://enduraflap.com/products/thermo-panel-3e?variant=39518501306447
-
Sliding Glass Door
9-34
12
Extra Large
https://enduraflap.com/products/thermo-panel-3e?variant=39518501503055
-
Sliding Glass Door
9-15
6
Small
https://enduraflap.com/products/vinyl-cat-door?variant=39518506418255
-
Sliding Glass Door
9-14
6
Small
https://enduraflap.com/products/vinyl-slider?variant=39518506516559
-
Sliding Glass Door
9-21
8
Medium
https://enduraflap.com/products/vinyl-slider?variant=39518506582095
-
Sliding Glass Door
9-27
10
Large
https://enduraflap.com/products/vinyl-slider?variant=39518506647631
-
Sliding Glass Door
9-34
12
Extra Large
https://enduraflap.com/products/vinyl-slider?variant=39518506713167
-
Window
9-15
6
Small
https://enduraflap.com/products/thermo-sash-3e-cat?variant=39518499536975
-
Window
9-15
6
Small
https://enduraflap.com/products/thermo-sash-3e?variant=39518503993423
-
Window
9-21
8
Medium
https://enduraflap.com/products/thermo-sash-3e?variant=39518504026191
-
Window
9-27
10
Large
https://enduraflap.com/products/thermo-sash-3e?variant=39518504058959
-
Window
9-34
12
Extra Large
https://enduraflap.com/products/thermo-sash-3e?variant=43883098013926
-
Sliding Glass Door
8-14
6
Small
https://enduraflap.com/products/severe-weather-vinyl?variant=43568595861734
-
Sliding Glass Door
8-21
8
Medium
https://enduraflap.com/products/severe-weather-vinyl?variant=39518506254415
-
Sliding Glass Door
8-27
10
Large
https://enduraflap.com/products/severe-weather-vinyl?variant=39518506319951
-
Sliding Glass Door
8-34
12
Extra Large
https://enduraflap.com/products/severe-weather-vinyl?variant=39518506385487
-
Door
9-16
6
Small
https://enduraflap.com/products/single-flap-thin-door?variant=43799113990374
-
Door
9-22
8
Medium
https://enduraflap.com/products/single-flap-thin-door?variant=43799114023142
-
Door
9-28
10
Large
https://enduraflap.com/products/single-flap-thin-door?variant=43799114055910
-
Door
9-36
12
Extra Large
https://enduraflap.com/products/single-flap-thin-door?variant=43799114088678
-
Wall
8-14
6
Small
https://enduraflap.com/products/endura-flap-builder-series-pet-door-for-walls?variant=43755941036262
-
Wall
8-21
8
Medium
https://enduraflap.com/products/endura-flap-builder-series-pet-door-for-walls?variant=43755941101798
-
Wall
8-27
10
Large
https://enduraflap.com/products/endura-flap-builder-series-pet-door-for-walls?variant=43755941167334
-
Wall
8-34
12
Extra Large
https://enduraflap.com/products/endura-flap-builder-series-pet-door-for-walls?variant=43755941232870
-
Wall
8-14
6
Small
https://enduraflap.com/products/endura-flap-builder-pro-series-for-walls?variant=43755940774118
-
Wall
8-21
8
Medium
https://enduraflap.com/products/endura-flap-builder-pro-series-for-walls?variant=43755940839654
-
Wall
8-27
10
Large
https://enduraflap.com/products/endura-flap-builder-pro-series-for-walls?variant=43755940905190
-
Wall
8-34
12
Extra Large
https://enduraflap.com/products/endura-flap-builder-pro-series-for-walls?variant=43755940970726
Endura Flap Double Flap Door Mount Pet Door (FFF)
Endura Flap Double Flap Door Mount Pet Door (FFF)
- Regular price
- $439.99
- Sale price
- $439.99 Sale
- Unit price
- /per
Adding product to your cart
- Best energy-efficient pet door for extreme cold or hot weather
- Installs into doors 1-3/4" to 2-1/4" thick
- Weatherproof double flap is ideal for areas with extreme hot/cold climate and strong winds
- Complete magnetic seal to resist winds up to 50mph
- Total freedom for you and your pet
- Comes with a sturdy ABS plastic locking cover
Endura Flap Double Flap Door Mount Pet Door (FFF)
Small / White Edit

Product Details
- Heavy-duty double flaps with a complete magnetic seal for an unbeatable insulation value and weather resistance
- Total weather resistance in temperatures from -40 „‰ to 110 „‰
- Made to be installed in all types of doors including, but not limited to, solid core doors, hollow core doors, metal doors, storm doors
- High-quality flap will not warp or crack in the heat and cold
- Secure Locking Cover with the strength of 1/16" of steel to block access when needed
- Flexible flap swings on a rod at the top to avoid cracking and flexing
- Double flap design ideal for severe weather conditions
- Four sizes available from small for cats to extra large for large dogs like Great Danes designed to accommodate most breeds
- Option to add or decrease magnet strength, perfect for training pets or increasing already significant wind resistance
Need help installing? Read our Dog Door for Doors Installation Guide.
There has been lots of discussion as to why the Endura Flap is such a high-performing pet door, but for engineers or those looking for some more technical information here is a 74-page dog door energy efficiency study showing what makes it so special.
Size & Measurement Guidex
x
Find The Best Pet Door Size For My Pet

A
Pet Height: inches
B
Pet Width: inches
Please fill the above fields.
Customer Reviews
- Reviews
- Questions
Thank you for submitting a review!
Your input is very much appreciated. Share it with your friends so they can enjoy it too!
Great, sturdy, and well sealed.
This was the most amazing DIY I could have done to give my dog the freedom to go outside when she needs to. With both flaps, there is no air loss of outside air getting in. You can feel the frame is cold but even in 0 degree temps, I don't feel any cold air sneaking in through the flaps. The magnets can be loud as they grasp close but I don't mind, it makes me aware that the dog has gone through it. The magnets are so strong, the cat can't even get one layer to budge let alone escape through both layers. It was a bit tricky to line up perfectly but with the correct tools, it was pretty easy for a novice to install. I put it in the wall of the house almost four months ago and it was the best decision.; This was the most amazing DIY I could have done to give my dog the freedom to go outside when she needs to. With both flaps, there is no air loss of outside air getting in. You can feel the frame is cold but even in 0 degree temps, I don't feel any cold air sneaking in through the flaps. The magnets can be loud as they grasp close but I don't mind, it makes me aware that the dog has gone through it. The magnets are so strong, the cat can't even get one layer to budge let alone escape through both layers. It was a bit tricky to line up perfectly but with the correct tools, it was pretty easy for a novice to install. I put it in the wall of the house almost four months ago and it was the best decision.
Adjustable to fit. With the right tools.
We ran this dog door through the wall, next to our door. It was fairly easy to install with the directions and hole template provided. I had left my better snips at another location so the sizing of the pass through area was a little rough but I am not taking away any stars because of my stupidity. In fact, it demonstrates the quality and, what I hope to be, durabilty of the door. We have five large German Shepherd Dogs that are kind are a mix of brute, curious, and harbringer of chaos. They are handling the dog door with no problem and it is standing up to their use/abuse. I did order and extra door after installation because the dogs cannot see through the double flaps and bang into it when closed. Or they are idiots. I also installed this just before the recent big winter storm and it did not have any effect on the heat in the kennel area.; We ran this dog door through the wall, next to our door. It was fairly easy to install with the directions and hole template provided. I had left my better snips at another location so the sizing of the pass through area was a little rough but I am not taking away any stars because of my stupidity. In fact, it demonstrates the quality and, what I hope to be, durabilty of the door. We have five large German Shepherd Dogs that are kind are a mix of brute, curious, and harbringer of chaos. They are handling the dog door with no problem and it is standing up to their use/abuse. I did order and extra door after installation because the dogs cannot see through the double flaps and bang into it when closed. Or they are idiots. I also installed this just before the recent big winter storm and it did not have any effect on the heat in the kennel area.
Five Stars
Awesome no drafts
Five Stars
This is a very quality door and seals well even in winds.
VERY sturdy and WONDERFUL dog door!
We LOVE this double-flap dog door! Our new puppy is currently 57 lbs and she went through it - the minute it was installed! It's installed in a door that's on the north side of our house, and it does a WONDERFUL job at keeping out the cold and snow! VERY sturdy and we had an easy time installing. EXTREMELY happy with this purchase!; We LOVE this double-flap dog door! Our new puppy is currently 57 lbs and she went through it - the minute it was installed! It's installed in a door that's on the north side of our house, and it does a WONDERFUL job at keeping out the cold and snow! VERY sturdy and we had an easy time installing. EXTREMELY happy with this purchase!
Size & Measurement Guide x
x
Installation Instructions
Customer Reviews
- Reviews
- Questions
Thank you for submitting a review!
Your input is very much appreciated. Share it with your friends so they can enjoy it too!
Great, sturdy, and well sealed.
This was the most amazing DIY I could have done to give my dog the freedom to go outside when she needs to. With both flaps, there is no air loss of outside air getting in. You can feel the frame is cold but even in 0 degree temps, I don't feel any cold air sneaking in through the flaps. The magnets can be loud as they grasp close but I don't mind, it makes me aware that the dog has gone through it. The magnets are so strong, the cat can't even get one layer to budge let alone escape through both layers. It was a bit tricky to line up perfectly but with the correct tools, it was pretty easy for a novice to install. I put it in the wall of the house almost four months ago and it was the best decision.; This was the most amazing DIY I could have done to give my dog the freedom to go outside when she needs to. With both flaps, there is no air loss of outside air getting in. You can feel the frame is cold but even in 0 degree temps, I don't feel any cold air sneaking in through the flaps. The magnets can be loud as they grasp close but I don't mind, it makes me aware that the dog has gone through it. The magnets are so strong, the cat can't even get one layer to budge let alone escape through both layers. It was a bit tricky to line up perfectly but with the correct tools, it was pretty easy for a novice to install. I put it in the wall of the house almost four months ago and it was the best decision.
Adjustable to fit. With the right tools.
We ran this dog door through the wall, next to our door. It was fairly easy to install with the directions and hole template provided. I had left my better snips at another location so the sizing of the pass through area was a little rough but I am not taking away any stars because of my stupidity. In fact, it demonstrates the quality and, what I hope to be, durabilty of the door. We have five large German Shepherd Dogs that are kind are a mix of brute, curious, and harbringer of chaos. They are handling the dog door with no problem and it is standing up to their use/abuse. I did order and extra door after installation because the dogs cannot see through the double flaps and bang into it when closed. Or they are idiots. I also installed this just before the recent big winter storm and it did not have any effect on the heat in the kennel area.; We ran this dog door through the wall, next to our door. It was fairly easy to install with the directions and hole template provided. I had left my better snips at another location so the sizing of the pass through area was a little rough but I am not taking away any stars because of my stupidity. In fact, it demonstrates the quality and, what I hope to be, durabilty of the door. We have five large German Shepherd Dogs that are kind are a mix of brute, curious, and harbringer of chaos. They are handling the dog door with no problem and it is standing up to their use/abuse. I did order and extra door after installation because the dogs cannot see through the double flaps and bang into it when closed. Or they are idiots. I also installed this just before the recent big winter storm and it did not have any effect on the heat in the kennel area.
Five Stars
Awesome no drafts
Five Stars
This is a very quality door and seals well even in winds.
VERY sturdy and WONDERFUL dog door!
We LOVE this double-flap dog door! Our new puppy is currently 57 lbs and she went through it - the minute it was installed! It's installed in a door that's on the north side of our house, and it does a WONDERFUL job at keeping out the cold and snow! VERY sturdy and we had an easy time installing. EXTREMELY happy with this purchase!; We LOVE this double-flap dog door! Our new puppy is currently 57 lbs and she went through it - the minute it was installed! It's installed in a door that's on the north side of our house, and it does a WONDERFUL job at keeping out the cold and snow! VERY sturdy and we had an easy time installing. EXTREMELY happy with this purchase!