Wastewater heat-recovery systems are gaining momentum, as cities and building managers look to capture the energy from hot ...

Homeowners are swapping traditional water heaters for an energy-efficient heat pump water heater — here's how to get ...

These water heaters are far more energy-efficient than conventional options. We put 10 models to the test.By Yasmeen KhanHeat pump water heaters have been around for decades, but it’s only ...

Tired of wasting water while you're waiting for it to get hot? Put an end to that problem by installing a tank-style or ...