Blower Door Test

Blower door tests are used to measure the airtightness level of buildings’ envelopes, diagnose and demonstrate air leakage problems, estimate natural infiltration rates, estimate efficiency losses from building air leakage, and certify construction integrity.

A calibrated blower door consists of a calibrated fan for measuring an airflow rate, and a manometer to measure the air pressure created by the fan flow. The combination fan and manometer measurements are used to determine the building airtightness.

The air tightness of a building is useful knowledge when trying to increase energy conservation or decrease indoor air pollution, or control building pressures.

We also carry out the airtightness tests for the following certification protocols:

  • LEED
  • DGNB