Heat pump water heaters can be a great way to keep your showers hot and refreshing, but they could be even more efficient with these well-researched tips.

In a December 2014 Plumbing & Mechanical Hydronics Workshop column, we discussed the benefits of dual-fuel systems that combine a geothermal water-to-water heat pump with a mod/con boiler. The boiler ...

Several years ago, I was on vacation in the Black Hills of South Dakota with my wife Kathy and two of our grandchildren. We had just passed the heads of the presidents on Mount Rushmore when a small ...

Scientists in China have designed a photovoltaic-thermal integrated air-source heat pump hot water system that uses a phase change tank to lower energy consumption and achieve higher power generation ...

Ground source heat pumps use highly energy-efficient technology to heat homes and other buildings. But whether it's the right choice for you will depend on several factors, including how much garden ...