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Thermo Sash 3e Pet Door for Sash Windows (FFF)

Thermo Sash 3e Pet Door for Sash Windows (FFF)

Regular price
$429.99
Sale price
$409.99
Unit price
per 
White
Brushed Aluminum
Dark Bronze/Black

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  •  Durable and insulating pet door for windows
  • Low-E glass and sturdy aluminum framing
  • Energy-efficient flap design keeps home insulated
  • Various flap sizes, colors, and adjustment ranges to fit your pet and your window
  • Strong and sturdy Locking Cover included  to secure your home and pet
  • Easy to install and doesn't require semi-permanent installation, perfect for renters and vacation homes

Product Details

  • Highly insulating flap with a complete magnetic seal, designed to stay closed in winds up to 50mph
  • Complete magnetic seal  designed to stay closed in winds up to 50mph
  • Polyolefin polymer flap keeps your home comfortable in temperatures between -40 and 110 „‰
  • LoE glass gives you extra insulation for your home, pairs perfectly with newer energy-efficient windows
  • Four sizes available to fit cats to large breed dogs
  • Fits all vertical sliding sash window widths with a track width of at least 1"
  • Draft stopper and weatherstripping included for extra insulation and weather resistance
  • Easy, tool-free installation in a matter of minutes

 

Need help Installing? Take a look at our Thermo Sash Installation page.

Find The Best Pet Door Size For My Pet

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Pet Height: inches

B

Pet Width: inches

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Customer Reviews

Customer Reviews
4.8 Based on 42 Reviews
5 ★
83% 
35
4 ★
14% 
6
3 ★
2% 
1
2 ★
0% 
0
1 ★
0% 
0
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
PF
08/26/2022
Paul F.

Great pet door but the instructions were for a sliding glass door model not the sash window model. We figured it out but the correct instructions would have made it a lot easier!

So far so good!

CG
04/04/2022
Cynthia G.

Thermo Sash 3e Pet Door for Sash Windows

I bought this door for the catio I built outside a bedroom window and it is exactly what I was hoping for. Keeps the cold out and the cat happy. Being able to change which side the flap is on is a huge bonus. It's a well designed window/pet door and built to last. I'm very glad I bought it!

BH
04/04/2022
Barbara H.

well made and so easy to install

This product is a life saver for me as I don't have to wake up to my cat crying to go out anymore. I have 3, one conquered it in about 2 weeks (I did put masking tape over the magnets to lessen the strength and I did prop the door open with a jar so that the cats get used to coming and going through it. My second cat is just on the verge and if I push his paw through, he can take it from there. My third is fickle and scared of everything, not sure he'll ever conquer but when the weather is nice and I don't need heat or air, I still prop the door open. I did build a little staircase out of paver stones on both sides to help them get thru and I have a small cat castle on both sides of window portion so that they can look thru while they try to figure it out. Yes, they are beyond spoiled. The window is very well made and we have had some crazy winds and it didn't effect it one way or another.

JB
04/04/2022
Julie B.

Window Dog Door - Great Solution

I live in a beautiful Dutch Colonial house with lots of old quirks that fit the house. I didn't want to damage a door or put a whole in a wall. I found this window insert and it is the perfect solution to my dilemma. It allows my dog to go in and out while protecting the integrity of my house. The window insert arrived packaged well. It was easy to install and works as described. I am very satisfied and would repurchase this item if I had a similar need.

SM
07/08/2020
Scott M.

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Thermo Sash 3e Pet Door for Sash Windows (FFF)

22" - 25" / White / Small Edit

White Thermo Sash

Installation Instructions

Customer Reviews

Customer Reviews
4.8 Based on 42 Reviews
5 ★
83% 
35
4 ★
14% 
6
3 ★
2% 
1
2 ★
0% 
0
1 ★
0% 
0
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
PF
08/26/2022
Paul F.

Great pet door but the instructions were for a sliding glass door model not the sash window model. We figured it out but the correct instructions would have made it a lot easier!

So far so good!

CG
04/04/2022
Cynthia G.

Thermo Sash 3e Pet Door for Sash Windows

I bought this door for the catio I built outside a bedroom window and it is exactly what I was hoping for. Keeps the cold out and the cat happy. Being able to change which side the flap is on is a huge bonus. It's a well designed window/pet door and built to last. I'm very glad I bought it!

BH
04/04/2022
Barbara H.

well made and so easy to install

This product is a life saver for me as I don't have to wake up to my cat crying to go out anymore. I have 3, one conquered it in about 2 weeks (I did put masking tape over the magnets to lessen the strength and I did prop the door open with a jar so that the cats get used to coming and going through it. My second cat is just on the verge and if I push his paw through, he can take it from there. My third is fickle and scared of everything, not sure he'll ever conquer but when the weather is nice and I don't need heat or air, I still prop the door open. I did build a little staircase out of paver stones on both sides to help them get thru and I have a small cat castle on both sides of window portion so that they can look thru while they try to figure it out. Yes, they are beyond spoiled. The window is very well made and we have had some crazy winds and it didn't effect it one way or another.

JB
04/04/2022
Julie B.

Window Dog Door - Great Solution

I live in a beautiful Dutch Colonial house with lots of old quirks that fit the house. I didn't want to damage a door or put a whole in a wall. I found this window insert and it is the perfect solution to my dilemma. It allows my dog to go in and out while protecting the integrity of my house. The window insert arrived packaged well. It was easy to install and works as described. I am very satisfied and would repurchase this item if I had a similar need.

SM
07/08/2020
Scott M.

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