DALLAS -- Life in the U.S. has largely returned to a pre-pandemic normal. People are tired of masking and remaining socially distant, even though contagious COVID-19 variants show no signs of going ...

An air cleaner can help remove indoor pollutants and reduce the spread of pathogens such as the coronavirus. The Post’s Lena Sun demonstrates how to make one. (Video: Joy Sung, Lena Sun, Jayne ...

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 ...