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

The launch of the NWP500 Series perfectly reflects Navien’s ongoing commitment to innovation and environmental responsibility ...

Three years ago, Ted Treadwell turned his water heater into a battery. His home in Santa Rosa, California, had relied on a ...

An international research group has investigated how PV-powered heat pumps and district heating could be combined to heat a ...

Navien’s new NWP500 Series heat pump water heater delivers ultra-quiet operation, built-in Wi-Fi and energy savings.

To come up with our heat pump water heater ratings, we tested all models in heat pump mode only. We filled each water heater tank with cold water of the same temperature and then set them to reach ...