Blower Door Systems

Blower Door Systems

Blower Door and Duct Testing Equipment are designed to identify air leakage in a home, building, or facility. Air leakage in a home, building, or facility can increase heating and cooling costs dramatically and cause problems with comfort, moisture, and health. While the technology has been around for many years , it is still not yet commonplace, so there is great opportunity for contractors who want to add this service to their capabilities. Retrotec Inc. is the world's leading manufacturer of air leakage testing equipment.

• Home Inspectors
• Professional Energy Auditors
• HVAC/R Contractors
• Large Facility/Property Managers

How does a Blower Door System Work?
An apparatus consisting of a calibrated variable speed fan built into an assembly is installed in place of a door. Manometer gauges or digital manometers are also installed to measure pressure differential. Outside air is forced into the property being evaluated creating a positive pressure as compared to outside or the reverse is performed creating a negative pressure. The auditor can use a smoke pencil to locate air leaks.

Data typically collected from Blower Door tests:

• Air flow at various pressures
• Air-changes per hour (ACH)
• Leakage area (ELA)
• Air flow per area