Hansen explains that age is often one of the most reliable indicators. In the Pacific Northwest, heating systems face damp, ...

Google Nest Smart Thermostat knows your schedule and preferences, then optimizes the heating automatically to reduce waste.

That annual inspection and maintenance appointment can also help save you money. Picard said buildup within your HVAC system can lead to efficiency losses of up to 10% annually, which you'll see on ...

Mike De Socio is a CNET contributor who writes about energy, personal finance, electric vehicles and climate change. He's also the author of the nonfiction book, "Morally Straight: How the Fight for ...