Ideal Pet Aluminum Sash Window Pet Door

In Stock
Adding to cart… The item has been added

The Ideal Pet Aluminum Sash Window Pet Door

This pet door is specifically tailored for aluminum sash windows, blending functionality with style – the perfect addition to keep your beloved pet both happy and safe.


Why this pet door for windows?

Elegant white aluminum finish: Crafted with high-quality materials, it's not just durable but also adds a touch of elegance to your window.


Effortless installation

Designed for easy integration, it fits seamlessly into most styles of aluminum sash windows.


A perfect fit

Step 1, choose your window width:

  • 23" to 28"
  • 27" to 32"
  • 33” to 38”

Step 2, choose your flap size:

  • Cat Flap: ideal for your feline friends (2 to 12 Lbs.)
  • Chubby Kat: a perfect size for larger cats (2 to 25 Lbs.)
  • Small: suitable for smaller dog breeds (2 to 12 Lbs.)
  • Medium: designed for medium-sized dogs (13 to 35 Lbs.)
  • Extra Large: spacious enough for larger dog breeds (36 to 90 Lbs.)





23" Model

Pet DoorsModel #Flap SizeRecommended WeightWindow Height
Cat Flap™ P23SWDCF 6-1/4"x6-1/4" 2 to 12 Lbs. 10-3/4"
ChubbyKat™ P23SWDCK 7-1/2"x10-1/2" 2 to 25 Lbs. 15-1/8"
Small P23SWDS 5"x7" 2 to 12 Lbs.


Medium P23SWDM 7"x11-1/4" 13 to 35 Lbs.


27" Model

Pet DoorModel #Flap SizeRecommended WeightWindow Height
Cat Flap™ P27SWDCF 6-1/4"x6-1/4" 2 to 12 Lbs. 10-3/4"
ChubbyKat™ P27SWDCK 7-1/2"x10-1/2" 2 to 25 Lbs. 15-1/8"
Small P27SWDS 5"x7" 2 to 12 Lbs. 12-1/2"
Medium P27SWDM 7"x11-1/4" 13 to 35 Lbs. 16-5/8"
Extra Large P27SWDXL 10-1/2"x15" 36 to 90 Lbs. 20-3/8"

33" Model

Pet DoorModel #Flap SizeRecommended WeightWindow Height
Cat Flap™ P33SWDCF 6-1/4"x6-1/4" 2 to 12 Lbs. 10-3/4"
ChubbyKat™ P33SWDCK 7-1/2"x10-1/2" 2 to 25 Lbs. 15-1/8"
Small P33SWDS 5"x7" 2 to 12 Lbs. 12-1/2"
Medium P33SWDM 7"x11-1/4" 13 to 35 Lbs. 16-5/8"
Extra Large P33SWDXL 10-1/2"x15" 36 to 90 Lbs. 20-3/8"

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
    Chubby Cat Door

    Posted by Brady on 29th Jan 2024

    These work great for our application!

  • 5
    Exactly what I needed & cheaper than Amazon!

    Posted by Unknown on 29th May 2023

    I saved ~ $20 buying it straight from idealpet rather than if I had purchased on Amazon. Looks great in my window and even my 85 pound lab can use it easily. My relatives liked the look and function of it so much that they will be buying the smaller option for their cats

  • 5
    Ideal Pet - ChubbyKat Door Window Insert

    Posted by Unknown on 18th Oct 2022

    This product is exactly as advertised. My husband was able to install the window easily - we got the 23" insert with the ChubbyKat door - it took him less than 5 minutes. Our cat is a Maine Coon, approximately 15 pounds so the ChubbyKat door was a perfect size for him. We already have a cat door going into the garage so Rex can access his litterbox and it took him about one week to get used to the window door, which provides him access to the lanai out back. It's a great product with great value! We are so glad we no longer have to jump up and down to let Rex in and out of the patio door!

  • 5
    Fast delivery, easy installation

    Posted by Kimberly Wright on 15th Oct 2022

    I ordered the door on Wednesday, and it was delivered on Saturday morning (I'm in central California). Easy, no-tool installation, and the foam bumper seal and vinyl draft seal are included. The only additional item I need are sash locks to hold the window in place. Now to teach the cat how to use it! I had a similar door years ago, from another manufacturer, and this one seems much better.

  • 5

    Posted by George on 3rd Jul 2022

    The pet door was easy to order online, delivered on time, and easy to install. Kudos for a well-designed product and a very usable website.

  • 5
    Cat flap

    Posted by Unknown on 23rd Apr 2022

    This product is well made, easy to install and my cats use it. Well, one of them does. The other is still trying to figure it out. It didn’t quite fit in the window track but it was easy to bend the metal a bit to get a snug fit. This company has excellent customer service too, should you need it. I’m glad I purchased it and so are my cats.

  • 4
    Just as described

    Posted by Unknown on 3rd Jan 2022

    The pet door is perfect for allowing our cat the freedom to roam into and out of our screened-in porch. The cat pushes the door open with ease and the window stays in place!

  • 5
    Easy to install

    Posted by Unknown on 5th Dec 2021

    The installation of the window cat door went so smoothly. The cats were curious and caught on quickly. We did not have to alter our door.

  • 5
    Great Doggie Door

    Posted by Julius Sutton on 13th Nov 2021

    This is the easiest dog door to install. It took less than 30 minutes. I only suggest you purchase some window locks to keep the window from being opened after installing. But again this is the perfect dog door that I’m using at my lake house.

  • 5
    Innovation at its finest

    Posted by Jaden Woods on 25th Sep 2021

    Because the door that I have has glass and I couldn’t really cut a hole into it that was half in the glass and half in the wood, I thought that I’d either have to drop several hundreds of dollars on a entirely new door or rent a power tool to cut into our brick and through an interior wall if I wanted to have a doggie door for my dogs, but because I found this product, I was able to save so so so much money. Installation was super simple, it won’t affect the value of my home when it comes time to sell it, and we could even take it with us when we travel with our dogs. I want to personally thank whoever thought up and designed this product because it’s fantastic.