When you shop through retailer links on our site, we may earn affiliate commissions. 100% of the fees we collect are used to support our nonprofit mission. Learn more. Apartment living has its ...

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 ...

This column is part of a series for the Design special report of The New York Times. Readers are invited to send questions to [email protected]. I would like to install central air-conditioning ...