Title: What is a Net-zero House | Our Net-Zero House
Headings: What is a Net-zero House
What is a Net-zero House
Content: Thermal Bridging is a four letter word in house construction. A traditional exterior wall the studding will “thermal bridge” cold into the house, so will traditional windows, sill plates, and on and on. So fighting bridging is a high goal. The house must be sealed, very, very tight. Measured by a “blower door” test. The house is closed up and a sealed fan is installed in a door. The fan sucks the air out of the house. The measurement is the number of Air Changes per hour at a pressure of 50 pascals or XXACH50. The houses we grew up in would be 10ACH50 or more, houses in the past 10 years 7/7ACH50; today’s (2015) code built homes are 3ACH50.