Effective HVAC filtration is at the heart of acceptable indoor air quality (IAQ). It helps keep indoor environments relatively free from the dust and particulates that may reduce productivity, affect the health of building tenants, or cause other problems. Filters will only support good IAQ and perform as specified, however, when they are installed and maintained correctly.
Proper filter maintenance is crucial to keeping HVAC ductwork clean. If dirt accumulates in the ductwork, and if the relative humidity reaches the dew point and condensation occurs, ductwork can become a breeding ground for bacteria and mold. This is especially the case in HVAC systems that are prone to mold growth, such as those with acoustical duct liners.