NAMSAN Cat Door Interior Door
- Cat Door
- Better rated than 73%
- More reviewed than 84%
A straightforward flap door with a lockable four way setting, useful for a first cat door on a standard interior or exterior door.
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How it ranks among the 51 cat doors we track
4.6★ across 3,500 Amazon ratings, Bayesian-smoothed toward the category average.
3,500 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 51 cat doors we track - how the scorecard works · full cat doors data report. Confidence: limited - incomplete product information.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
This is a flap style pet door for interior installation, sized for a 7.1 by 7.3 inch flap opening and finished in white. It mounts into wooden or metal doors, or into a window panel, and suits cats and small dogs rather than full sized dogs.
The main feature is a 4 way lock that switches the flap between in only, out only, both ways, and fully locked, so one door handles daytime access and nighttime security without extra hardware. Namsan markets it as weatherproof for exterior use, though the white interior finish points to indoor doors as the main fit.
- 7.1 x 7.3 inch flap opening
- 4 way locking flap
- White finish for interior doors
- Weatherproof rated for exterior use
Who it's for
Cat owners who want a pet to move between rooms or in and out of the house without a door left propped open. Also workable for small dogs that fit the flap opening size.
Strengths and trade-offs
Drawn from this product's published specifications.
- 4 way lock covers entry, exit, and full lockout
- Installs in wood, metal, or window panels
- Sized for cats and small dogs
- No listed door thickness range to confirm fit
- Opening too small for medium or large dogs
Performance notes
The 4 way lock is the functional core: turning it restricts the flap to entry, exit, both, or full lockout, letting an owner control access at set times of day. No thickness range is listed for the doors it fits, so measure before buying.
Specifications
| Brand | Namsan |
|---|
Other Namsan cat doors
How it compares
This product against the closest alternatives we track in cat doors.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| NAMSAN Cat Door Interior DoorThis product | 4.6 / 5 | 3,500 | 2.7 / 5 |
| Purrfect Portal Meow Manor® Cat Door Interior DoorPurrfect | 4.9 / 5 | 7,451 | 4.7 / 5 |
| PetSafe Interior Cat DoorPetSafe | 4.4 / 5 | 16,272 | 4.4 / 5 |
| Ideal Pet Products Cat Flap Door with 4 Way LockIDEAL | 4.6 / 5 | 2,900 | 4.2 / 5 |
| Dog Door for Screen Doordog | 4.5 / 5 | 3,600 | 4.1 / 5 |
Similar cat doors from other brands
Questions about the Namsan cat doors
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What size opening does the Namsan cat door have?
7.1 by 7.3 inches, sized for cats and small dogs rather than larger breeds.
Can the flap be locked shut?
Yes, the 4 way lock includes a fully locked position along with in only, out only, and both ways settings.
Does it fit metal doors?
Namsan lists it as suitable for wooden or metal doors as well as windows.