27 Jul '15, 7pm

Passive House Pet Doors. We’re not joking.

C: this feline, named Pauline, is a model for the Austrian company PetWALK, which manufactures insulating, airtight pet doors. Its doors are certified by the Passivhaus Institut. Whether Pauline is going outside to glare at the neighbors, interact with the wildlife, or find a quiet sandbox to do its business is anyone’s guess. PetWALK isn’t the only temperature- and air-sensitive pet door on the market. There’s also Freedom Pet Pass, an American company whose products are featured in several Passive Houses in North America. Both companies provide pet doors with an airtight seal. Pet Pass claims that a standard blower-door test at 50 pascals (roughly equivalent to 25 mph) resulted in no detectable air leakage. Compare that to a standard dog door, which leaked 19 cfm/ft2 —a lot. The company began after the owners found a small pile of snow in their living room as a result of...

Full article: http://www2.buildinggreen.com/image-of-the-week/what-cat-...

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