What does a Blower Door Test do and what are the benefits?
A blower door is a device with a calibrated fan, and gage called a manometer to measure how much air a home leaks. The assembly mounts into an exterior door frame. The fan pulls air out of the house causing a pressure difference between inside and outside causing air to flow in through all unsealed cracks and openings. The Manometer measures the pressure differences and fan flow to calculate the Cubic Feet per Minute (CFM) of air leakage into the home.
The amount of air leakage helps the energy specialist determine if air sealing work is necessary. If air sealing is necessary the blower door can help find the area in the home where air leakage is the greatest.
Air leakage plays a critical role in energy consumption, comfort, and air quality issues. It is estimated that air leakage accounts for between 10-40% of heating and cooling cost. Homes that require air sealing can save between 10% to 20% on your heating and cooling bills.
What does a duct blaster do and what are the benefits?
A Duct Blaster is similar to the blower door except it is smaller and it is hooked to the heating and cooling ducts to measure air leakage in the duct system.
The amount of air leakage helps the energy specialist determine if air sealing work is necessary. If air sealing is necessary the Duct Blaster can help find the area in the home where air leakage is the greatest.
The effects of duct leakage depends on the location of the ductwork and the amount and the location of leakage. Leaky ducts in attics and crawlspaces can account for 20% or more of heating and cooling energy lose. they can also be the cause of comfort and air quality issues.