Federal energy data shows widespread HVAC installation issues, with airflow and duct design often limiting system performance during winter demand. Proper airflow is essential to system performance.

Installing a Heating, Ventilation and Air Conditioning (HVAC) system in your home may seem complicated, but with a little guidance we think you can pull it off. Even if you have no HVAC experience, ...

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 ...