Heat pumps are a popular choice for central air in the South. They both heat and cool—despite the somewhat misleading name—and can help save money on utilities. If you're wondering what a heat pump is ...

In the time it takes to type this sentence, I will have taken three breaths. Twelve in a minute, 20,000 a day, 7.5 million a year, most of them indoors. Yet until quite recently, researchers have not ...

The use of ultraviolet germicidal irradiation (UVGI) within an air handling unit (AHU) is growing rapidly. Typically UV lamps are installed for one of two reasons. In one application, high levels of ...