A new HVAC system can cut energy costs—but by how much? See average yearly savings, ROI timelines and what impacts your ...

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 ...

HVAC costs have been surging recently, but some homeowners are paying far more than necessary for their systems.

Whether you have a gas furnace, a heat pump or something else, regular upkeep can save you money and keep your home's air cleaner. Andrew King is an award-winning journalist and copywriter from ...