Ideal Pet Aluminum Sash Window Pet Door

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Keep your Perfect Pet happy and safe with pet doors specially designed for aluminum sash windows.

Pet Door Features Include:

    • High quality white finish aluminum construction
    • Installs easily into most styles of aluminum sash windows
    • 3 aluminum sash window sizes available: Adjustable width from: 23" to 28" (23) , 27" to 32" (27) and 33” to 38” (33)

      Cat Flap = 10-3/4"

      Chubby Kat = 15-1/8"

      Small = 12-1/2"

      Medium = 16-5/8"

      Extra Large = 20-3/8"



23" Model

Pet DoorsModel #Flap SizeRecommended Weight
Cat Flap™ P23SWDCF 6-1/4"x6-1/4" 2 to 12 Lbs.
ChubbyKat™ P23SWDCK 7-1/2"x10-1/2" 2 to 25 Lbs.
Small P23SWDS 5"x7" 2 to 12 Lbs.
Medium P23SWDM 7"x11-1/4" 13 to 35 Lbs.

27" Model

Pet DoorModel #Flap SizeRecommended Weight
Cat Flap™ P27SWDCF 6-1/4"x6-1/4" 2 to 12 Lbs.
ChubbyKat™ P27SWDCK 7-1/2"x10-1/2" 2 to 25 Lbs.
Small P27SWDS 5"x7" 2 to 12 Lbs.
Medium P27SWDM 7"x11-1/4" 13 to 35 Lbs.
Extra Large P27SWDXL 10-1/2"x15" 36 to 90 Lbs.

33" Model

Pet DoorModel #Flap SizeRecommended Weight
Cat Flap™ P33SWDCF 6-1/4"x6-1/4" 2 to 12 Lbs.
ChubbyKat™ P33SWDCK 7-1/2"x10-1/2" 2 to 25 Lbs.
Small P33SWDS 5"x7" 2 to 12 Lbs.
Medium P33SWDM 7"x11-1/4" 13 to 35 Lbs.
Extra Large P33SWDXL 10-1/2"x15" 36 to 90 Lbs.

Demo Video

Installation Video



How to measure your Ideal Pet

To determine the correct size door, simply measure the width (A) and height (B) of your pet.

(A) Measure the widest point of your pet's shoulder.

(B) Measure from the top of your pet's back (just behind their head) to the bottom of chest.

Pet door models have different size openings. Just make sure your new pet door's opening is both wider and taller than your pet's measurements to ensure they can comfortably pass through.

  • 5
    Great product

    Posted by Brittany Basden on 7th Jun 2021

    We purchased the 33" model with the medium door for our cats to freely go out onto our newly screened-in patio. The installation was easy and quick. They were going in and out on their own by day 3. We opted for the vinyl door over the cat door for what seemed like better security, and I'm glad we made that decision. The craftsmanship is really better than I could have expected. The door blends right into our window and looks really great from our living room. Wonderful company, wonderful product - will recommend to anyone and everyone that needs a pet door. Favorite purchase of 2021 so far!

  • 5
    Great Kitty Door

    Posted by Unknown on 5th Jun 2021

    Great kitty door. Very easy to install. Very sturdy and good material. I shopped around and this was a good buy. My cats freely go onto the screened porch.

  • 5
    Exactly what we needed!

    Posted by Leslie on 28th May 2021

    We ordered this to enable our cats to get out to a new catio. It’s very sturdy, and the instructions were very clear. Now if only the cats would learn to push their way through the swinging door … (This will come; we’ve had it in just a couple of days.)

  • 5
    Best window door out there!

    Posted by Rebecca on 25th Apr 2021

    I really didn’t think I would find a sturdy window door. They just aren’t available and certainly aren’t made as well as this one! It locks in, locks shut and looks so nice with the REAL windows on either sides of the doors. Great purchase! Highly recommended!

  • 5
    Wonderful Small Pet Door

    Posted by Warren on 11th Jul 2020

    Works amazingly for our kitty and chihuahua. It’s fits our window great! Looks very nice and modern.

  • 5
    Terrific solution

    Posted by Unknown on 29th Jun 2020

    The small sash window cat door we bought is a terrific solution for our cat(who is quite petite). She loves hopping in and out onto our upstairs deck ....which keeps her out of street trouble. If I have one suggestion it would be to beef-up the red open-close click switch. Otherwise this is a tremendous well-made window for a lucky cat.

  • 4
    Nice looking

    Posted by Linda on 19th May 2020

    The chubby cat sash window pet door installs securely in place. The flap is rigid and has a locking mechanism on the inside that turns to lock to preferences. Somehow when fully locked, my cat can still get out but can’t get back in. The flap got all scratched up on the outside from being locked out. Sometimes the door doesn’t fully shut to seal either.I still like it though and just don’t use the lock since I have an ambitious cat. I would prefer the flexible flap with a separate cover to lock—if I had to do it over again. Ideal Pet Products mailed me a replacement lock, but I haven’t replaced it yet since the original lock isn’t broken. Both my cats found it easy to use and like having their own door to their patio.

  • 5
    Easy and my cat loves it

    Posted by Christopher Travlos on 11th May 2020

    I was worried about sizing at first since I didn't know if I should count it as the whole window, or just the inside, or where to measure... ended up watching their how-to videos and it made me more certain of where I needed to measure. Check those out if you are confused. It works great, my cat got used to it very quickly and now enjoys the outdoors whenever he wants. I will say with a window one, make sure there is a platform on each side for the cat otherwise they won't be able to use it.

  • 5
    Outstanding product

    Posted by Jim on 16th Aug 2019

    Beautifully engineered product. Probably took longer to open the box than to install it. Perfect fit. Highly recommended.

  • 4
    Chubby Kat door

    Posted by Unknown on 2nd Aug 2019

    Easy to install, there is a slight air gap above the swing door. In the smaller door, this is not present, there is a bar across the gap. Cat is happy.