4.5(8,600)Amazon rating$136.59100+ bought last month
Our verdict
A sturdy aluminum sash window pet door for anyone who doesn't want to cut into a wall or door, this large flap size handles pets up to 90 pounds and adjusts to fit window widths from 33 to 38 inches without permanent installation.
Renters or homeowners who want a no-cut installation that mounts into an existing double-hung window, and multi-pet households with cats and dogs up to 90 pounds.
Skip if
You don't have a double-hung window in a usable location, or you need a permanent wall or door installation instead.
Breed size Large
Weight 12.1 Pounds
Priced 117% above the category median ($62.98 across 107 tracked models)
Our scorecard
4.5/5overall
Owner rating4.5/5
4.5 average across 8,600 owner ratings
Popularity4.3/5
8,600 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog and cat food, health, gear and grooming we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
["The Ideal Pet Products 33SWDXL is an aluminum sash window pet door built to slide into a standard double-hung window opening, adjusting to fit window widths from 33 to 38 inches wide. Because it mounts in the window track itself, there's no cutting into a door or wall, which makes it a practical option for renters or anyone who wants an installation they can remove later.", "The large flap measures 10.5 by 15 inches and is rated for pets up to 90 pounds, with the spec sheet listing it for both cats and dogs. The frame is aluminum rather than plastic, and it uses a lock-out slide closure so you can seal the opening completely when you don't want pets going in or out.", "At $136.59 this is priced more like a permanent installation than a small door insert, but it comes backed by a one year manufacturer's warranty and a strong track record, with 8,600 reviews and a 4.5 star average."]
Pros
No-cut installation that slides into an existing window frame
Large flap handles pets up to 90 pounds
Aluminum frame built more rugged than plastic-frame alternatives
Lock-out slide closure to seal the opening on demand
Backed by a one year manufacturer's warranty
Cons
Only fits window widths between 33 and 38 inches
At 12.1 pounds it's heavier and pricier than a basic door insert
Requires a suitable double-hung window in a usable location for pets
Specifications
Breed size
Large
Weight
12.1 Pounds
Performance notes
The lock-out slide closure is a physical panel you slide into place to block the flap, a simple, no-battery way to control access compared to smart or magnetic locking doors. Because the frame is aluminum instead of plastic, it's built to hold up to years of daily use.
What buyers say
With 8,600 reviews and a 4.5 star average, plus roughly 100 units bought in the past month, this window door has an established following among owners who don't want to modify a wall or door.
Yes, the spec sheet lists it for both cats and dogs, and the large flap size and 90 pound weight capacity give it room for a range of pet sizes.
Do I need to cut into my window or wall to install it?
No, this door slides into the track of an existing double-hung window, so no cutting is required, though it only fits windows between 33 and 38 inches wide.
Can I lock the door closed?
Yes, it uses a lock-out slide closure that lets you fully block the flap opening when you want to keep pets in or out.
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