A Calibrated Door Blower Test detects energy loss

Door Blower Test

The calibrated door blower test (air leakage test) allows an analysis of heat or cold air loss in a house. These leaks occur through doors, windows, vents or holes. Air leakage results in energy loss and higher energy costs. This test can detect even small leaks which could be costing quite a bit over time and make your HVAC systems work harder. A Door Blower Test measures ACH (Air changes per hour).

Manometer

The testing equipment consists of an exhaust fan mechanism with a sealed doorway block. These are mounted usually at the front door and depressurizes the interior of the house. When this happens the now greater outside air pressure tries to seep in through any opening regardless of how small. A manometer is used to measure air pressure once negative air pressure is achieved. A technician then goes room to room throughout the house to locate these seepages.

Properly Sealing your home

Once the areas of seepage are identified then a plan can be enacted to properly seal the home. An attic is a very common place to lose heat. Often testing begins there before proceeding to the main floor and the rest of the home. Fixes may include filling holes, adding or replacing insulation and seals for doors and windows.

IECC Energy Code

The IECC (International Energy Conservation Code) is a measure of a building’s thermal envelope (air tightness). These codes are energy conservation specific and are required in some new building codes for new construction. These codes are required in order to meet energy conservation requirements. In order to comply with these codes this testing becomes necessary.

The Calibrated Door Blower (Air Leakage) test can benefit everyday homeowners when they are trying to reduce their energy costs. Reducing energy costs are very beneficial, but limiting air loss can also help your HVAC systems work less. Air Doctor Heating and Air can help you assess your home’s need to have the test.

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