There is no doubt that consumers want healthier homes today. An HVAC system air filter upgrade is one way contractors can simultaneously increase customers’ residential IAQ and generate more business.

Electrostatic adsorption is an important complement to mechanical filtration for high-efficiency air filtering in the use of face masks. However, the electrostatic charge of the filters decays over ...

Q. Do you have any information about the type of furnace filters that are promoted by Paul Harvey? In particular, are they effective? Are there brands available in local stores? S.P. Chelsea. A. As ...