Typical pet doors are verboten in a Passive House. Most pet door are convenient for a dog or cat, but are way too leaky to keep out the drafts.
Treehugger’s Lloyd Alter came across a solution at the 21st International Passivhaus Conference in Vienna and posted this report about the PetWalk, a vault-like, insulated door that won’t mess up a blower-door test and still lets the family pet come and go at will.
The PetWalk will open on command via a motion detector or a transponder implanted under the pet’s skin. It also can be activated with a remote control. The door comes with a backup battery so it can still work during a power outage.
The Austrian tech company that developed the door says pets catch on quickly. The door seals so tightly, Alter reports, there was no measurable air leakage at a pressure difference of 600 pascals. (A standard blower door test measures leakage at a pressure difference of 50 pascals). It’s available with thermal insulation of up to 0.5 w/m2k (equal to R-11).
There are two sizes, priced at $1,754 and $1,974.