Until relatively recently centralized filters were installed in heating, ventilating, and air-conditioning (HVAC) systems to protect the system equipment rather than for the explicit benefit of the occupants. Today, building operators and HVAC system designers often consider using high efficiency filters to reduce the concentration of particulate matter in occupied space. While these filters can improve Indoor Air Quality (IAQ), their application is often not without significant cost. In addition to the increased initial cost associated with a high efficiency filter as compared to a standard low efficiency filter, differences in pressure losses and changes in air flow associated with various levels of filter load can impact the energy consumption of the system.
展开▼
