Why it matters
The flap uses two Lexan hard panels with an air gap between them for insulation. A spring-loaded locking slide keeps pets in or out. It fits doors 1-1/4 to 1-3/4 in thick and suits dogs 35–90 lb.
Who it's for, and who should skip it
Good fit if
- Large dogs
- Cold climates
- Standard doors
Look elsewhere if
- Owners wanting selective entry (any animal can use it)
- Renters who can't cut doors
- Metal or glass doors (check compatibility)
Pros and cons
Pros
- Dual-pane
- Locking slide
- Durable
Cons
- Hard flap
- Door thickness limit
- Price
Limitations to weigh
- Measure your dog's shoulder height and widest point; the flap top should sit at least an inch or two above the shoulder, and the step-over should be low enough for seniors and short legs.
- Any flap big enough for your dog can let in wildlife, other animals and, rarely, people; lock the closing panel at night and when you are away.
- Door and wall installs mean cutting; check for wiring and studs in walls, metal or glass in doors, and rental rules before you start.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Material | ABS thermoplastic | Retailer |
|---|---|---|
| Frame material | Plastic | Retailer |
| Dog size | Large | Retailer |
| Closure | Lock-Out Slide | Retailer |
| In the box | Air-Seal Pet Door - Large | Retailer |
| Product weight | 3.8 pounds | Retailer |
| Model number | ASXL | Retailer |
Alternatives worth comparing
More dog doors we cover
Final verdict
A solid insulated door.
Where to buy
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Questions buyers ask
What weight dogs does it suit?
35–90 lb.
What door thickness?
1-1/4 to 1-3/4 in.