What is a Blower Door Test?
A blower door test is a method used by HVAC companies to evaluate the airtightness and insulation of a home.
A blower door test is a method used by HVAC companies to evaluate the airtightness and insulation of a home. For years, high energy costs have been a significant concern for homeowners, and state laws now demand that homes meet energy efficiency guidelines. Unfortunately, many homes fail to comply with technical building code requirements.
Illinois is the first Midwest state to enforce the blower door test. Atlanta, Georgia, is leading other southern states in testing air conditioning units for HVAC duct and airtightness verification in new homes. The testing in Atlanta began in January 2011, but due to some minor setbacks, it was delayed until July 1, 2011. The delay occurred because training materials were not yet ready. However, the energy training and testing in Atlanta serve as an example for other states to follow.
Employees must attend classes to learn the new energy building code laws. Applicants undergo one week of training to become certified DET verifiers. The positive outcome is that each new home being built must pass the blower door test for energy efficiency. A well-functioning air conditioning unit is crucial during the summer months.
The law aims to help building owners reduce excessive energy use. It also mandates building improvements that many structures would not otherwise receive. New homes and buildings are required to have up-to-date HVAC wiring and energy-efficient appliances. Code laws change frequently, and many associations struggle to keep up with them.
So far, Wisconsin and Minnesota have limited code enforcement in place. North Dakota, South Dakota, Missouri, and Kansas have no HVAC energy code in place for buildings. The most significant expense for states implementing the mandated energy changes is training.
The test is beneficial because it locates leaks in the framework where air or heat may escape. The blower door is ideal for testing the effectiveness of air conditioning units and ductwork. It measures the amount of airflow or lack thereof and tests for possible leaks. The machine works well on small and medium-sized buildings.
Building researchers, contractors, and weatherization personnel use the blower door test to assist with home inspections and quality control checks. Ventilation is normal, but excessive ventilation could indicate a potential problem. The air is blown into or out of the building using the blower door fan, and the differential between the negative and positive pressures is then noted and recorded.
Forecast Heating, Cooling, and Refrigeration serves residential and commercial customers in Summerlin, Anthem, North Las Vegas, Boulder City and Las Vegas. Call us at 702-919-4546.
