Blow door demonstration with David White and Paul Castrucci Architect / by Paul Castrucci

A blower door is a machine used to measure the airtightness of buildings. It can also be used to measure airflow between building zones, to test ductwork airtightness and to help physically locate air leakage sites in the building envelope.

Demonstration was part of Open House New York Weekend Open House. 

Source: https://youtu.be/g2b53Ur2eHs