Blower Door Testing | Northern NJ
What is a blower door test?
A blower door test combines the use of a blower door and a manometer to measure pressure differential between the building envelope and the exterior. When the house is pressurized or depressurized to 50 pascals, the calibrated manometer will produce a cfm50 (cubic feet per minute at 50 pascals) number, a unit of measurement used to reference the air tightness of a home.
A blower door test allows you to both determine actual amount of air leakage in your home and locate the most problematic air leakage areas. Pre-project and post-project blower door testing can help quantify the effects of energy saving measures in a home and is also used to calculate Building Airflow Standard to verify compliance with ASHRAE 62-89 requirements.
Blower door testing is also utilized to determine Air Changes per Hour (ACH), a unit of measurement referenced to determine Energy Code Compliance. Blower door testing to determine ACH is one of the paths to compliance within the 2015 Energy Code.