In mid-July at the construction site at 1 Java Street in Brooklyn, New York, the outside temperatures can reach sweltering highs in the 90s. But 500-feet underground, it’s 55 degrees all year round.

Lee Wallender is a home improvement writer of nearly 20 years and specializes in home remodeling, repair and maintenance. Sami Allen is the managing editor at Forbes Home, with over seven years of ...

Living with geothermal heating and cooling is a lot like living with any other reliable HVAC system, but those who use it have interesting things to say about how it works and what it costs. There is ...

Dear Angie: I have a ground-source geothermal heating and cooling system. This summer, we've endured a significant drought and heat wave in our area, and I've noticed that our geothermal system has ...