Blower Door Test
This test measures your homes air tightness. A fan is mounted to an outside door and is used to pressurize and depressurize the house. By measuring the force created by running the fan and its ability to maintain pressure we are able to determine how much your home is leaking. This can also be used to determine if a house has enough ventilation for combustible appliances such as gas stoves and dryers. This is the primary tool for an energy audit.