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


Why choose Groundswell Contracting?

We follow recommended standards set forth by the Building Performance Institute (BPI) when performing blower door testing. Groundswell Contracting is a BPI Accredited Gold Star Contractor and has LEED AP personnel on staff.