If you need to purchase a gas-burning forced-air furnace but aren't sure how they work, here's what you need to know.

Learn all about your furnace pilot light — where it is, what it does, and how to troubleshoot the most common issue.

But efficient heat pumps will save you money, especially over the system's lifetime when compared to gas furnaces. In some cases, geothermal electric heat pumps can save you money over the most ...