All-Electric Heat Pump Water Heater - Heat2O®

Heat2O® is the future of sustainable water heating. Heat2O is a cold-climate heat pump water heater designed to provide Domestic Hot Water (DHW) in high-demand commercial applications while reducing environmental impacts. DHW accounts for roughly 25% of annual energy use in multifamily buildings. Boasting a coefficient of performance up to 4.52, Heat2O cuts on-site carbon emissions and offers energy savings of up to 70% compared to electric-resistance water heaters.

The all-electric heat pump uses natural CO2 refrigerant with a global warming potential (GWP) of one and an ozone depletion potential (ODP) of zero to supply hot water even when outside temperatures are as low as -13 F.

Heat2O achieves highly efficient heat exchange using a patented Twisted Spiral Gas Cooler with three refrigerant lines wrapped around a twisted water pipe. The CO2 refrigerant flows in the opposite direction of the water. Running the refrigerant lines along the pipe’s grooves increases the heat-conductive area while the spiral helps create a vortex in the pipe, accelerating the turbulence effect of water and reducing pressure loss in the heat exchanger. Transferring ambient thermal energy from outdoor air to potable water by cycling natural CO2 enables the system to supply hot water up to 176° F even when outside temperatures are as low as -13° F.

The INVERTER-driven scroll compressor in the outdoor unit increases energy efficiency by
modulating refrigerant flow and heating capacity to match loads. This technology enables
Heat2O to provide over four times more energy as heat than the system consumes in electricity.

Able to send and receive messages defined by the CTA-2045 specification, Heat2O can simplify demand-response program participation with a utility virtual end node in the system’s control panel. Before a demand-response event, the system can shift from the 40 kW normal mode to a 60 kW capacity mode to pre-load tanks with hot water.

Advancing all-electric heat pump water heater technologies like Heat2O reduces society’s dependence on fossil fuels while increasing energy efficiency and occupant comfort.