Heat₂O^® is an all-electric, cold-climate Heat Pump Water Heater designed to reduce the environmental impact of high-volume Domestic Hot Water (DHW) through energy-efficient operation and using CO₂ refrigerant. CO₂, a natural and environmentally friendly refrigerant with a global warming potential (GWP) of one and an ozone depletion potential (ODP) of zero, helps commercial facilities qualify for rigorous sustainability criteria and certifications such as passive house status. Using Heat₂O reduces on-site carbon emissions in the production of DHW.

Heat₂O is an engineered solution with comprehensive technical support. The system includes components designed and selected to ensure installation quality and optimal performance of the heat pump. Components include hot water storage tanks, swing tanks, secondary heat exchangers and variable-speed secondary circuit pumps.

The system achieves highly efficient heat exchange using Mitsubishi Electric’s patented Twisted Spiral Gas Cooler where three refrigerant lines are 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.

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