Duct & Envelope Tightness Testing in North Alabama

Advanced Service Company LLC has been certified by Southface Energy Institute as a Duct & Envelope Tightness tester since 2013. DET testing helps isolate duct leakage and structure infiltration problems.

Duct and envelope tightness testing is an important part of improving HVAC system efficiency and overall building performance. Over time, air ducts can develop leaks and gaps that allow conditioned air to escape before it reaches the intended rooms. Similarly, the building envelope—made up of walls, ceilings, windows, doors, and other structural components—can develop air leaks that allow outside air to enter and conditioned air to escape. These issues force HVAC systems to work harder to maintain comfortable indoor temperatures, which can increase energy costs and reduce system efficiency.

Duct tightness testing measures how much air is leaking from a building’s duct system. Technicians use specialized equipment, such as duct testers and pressure gauges, to pressurize the duct system and identify areas where air is escaping. This process helps locate leaks, disconnected ducts, or poorly sealed joints. Once these issues are identified, sealing and repairing the ductwork can improve airflow, increase comfort in different areas of the building, and help the HVAC system operate more efficiently.

Envelope tightness testing focuses on the overall air leakage of a building. One of the most common methods used is a blower door test, which temporarily installs a powerful fan in an exterior doorway to measure how much air leaks through the building envelope. The test helps identify problem areas such as poorly sealed windows, gaps around doors, attic leaks, and other openings that allow unwanted air infiltration. Improving envelope tightness can help stabilize indoor temperatures, reduce energy waste, and improve indoor air quality.

Advanced Service Company LLC can help both homeowners and businesses by providing professional duct and envelope tightness testing services. Their trained technicians use specialized diagnostic equipment to accurately measure air leakage and identify problem areas that may be affecting comfort and efficiency. After testing, they can recommend and perform improvements such as duct sealing, insulation upgrades, or air sealing solutions. By addressing these issues, Advanced Service Company LLC helps customers improve HVAC performance, lower energy bills, and create more comfortable indoor environments.

Advanced Service Company LLC provides professional duct and envelope tightness testing to help identify air leakage, duct leakage, comfort problems, and energy-efficiency issues in homes and buildings.

If your home has uneven temperatures, high energy bills, poor airflow, or comfort concerns, testing can help pinpoint hidden problems.

Call 256-432-7622