Posted on October 10, 2011 by Scott Gibson
Building tight houses is a fundamental step toward energy efficiency, and figuring out how well you’ve done is actually pretty simple.
Air leakage is calculated with a blower-door testTest used to determine a home’s airtightness: a powerful fan is mounted in an exterior door opening and used to pressurize or depressurize the house. By measuring the force needed to maintain a certain pressure difference, a measure of the home’s airtightness can be determined. Operating the blower door also exaggerates air leakage and permits a weatherization contractor to find and seal those leakage areas.. A technician depressurizes the house with a blower sealed into a doorway and measures how much air can pass through the building envelopeExterior components of a house that provide protection from colder (and warmer) outdoor temperatures and precipitation; includes the house foundation, framed exterior walls, roof or ceiling, and insulation, and air sealing materials..