What Is A Blower Door System

The blowerdoor multiplefan system was developed for airtightness measurements of large buildings with an internal volume of up to 440 000 m.

What is a blower door system.

A blower door test is a way to check how air tight a structure is. Because houses are built in the field and the joints are where the action is at. 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. Air flow through the fan is determined by measuring the pressure at the flow sensor which is attached to the end of the motor.

A blower door is a machine used to measure the airtightness of buildings. While a blower door test does not evaluate how well a structure is insulated it can reveal drafty walls and air bypass situations that could undermine otherwise well insulated wall assemblies. 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. The auditors may use a smoke pencil to detect air leaks.

A blower door is mounted in an external door frame hoses are connected to measure the air pressure outside inside and in the fan assembly and a manometer is set up to run the whole test the fan in the door blows air out of the house depressurizing the home to a set standard with the outside. The minneapolis blower door has long been recognized as the best designed and supported building airtightness testing system in the world. It is designed to check for air leaks in walls attics and mechanical penetrations. The fan pulls air out of the house lowering the air pressure inside.

Combined with specialized accessories and testing procedures developed by the energy conservatory the minneapolis blower door is the system of choice for utility dsm programs energy raters hvac contractors and weatherization professionals. A blower door is a powerful fan that mounts into the frame of an exterior door. Blower doors were developed originally for houses as most good energy efficiency technologies are commercial debt is basically 15 20 years behind and this blower door testing is a classic example. So here s a basic concept 00 49.

Additional applications bau tools blowerdoor.