The LG Inverter Heat Pump Water Heater offers a Uniform Energy Factor of 3.75, which will deliver greater energy savings (when the unit isn’t operating off the electric-resistance backup) than conventional electric water heaters. This water heater reportedly provides up to 66 gallons of hot water every hour. The inverter system allows the heat pump to operate down to 23°F ambient air temperature, minimizing the need for the backup heat source. The water heater functions at a quiet sound level of 32 dBA and can be managed remotely using the LG ThinQ phone app.