A big factor in good indoor air quality is installing the right air filter. That simple component of your HVAC system plays a far bigger role in a home's comfort and health than many people realize.

Running your furnace, central air, or heat pump probably constitutes a big part of your utility bill. But it’s a small, often inexpensive part—the air filter—that keeps these heating and cooling ...

• Filters must be tested in a dynamic environment to predict how they will perform under real-world conditions. • Standards filter tests run at a constant flow rate. •DFE multipass tests subject ...

The selection of component values for common mode filters need not be a difficult and confusing process. The use of standard filter alignments can be utilized to achieve a relatively simple and ...