Heating, Ventilation, and Air Conditioning Products Design Hydrolution EZY Series Residential Air to Water Heat Pump by MHI Thermal Systems, Ltd. The unit is a residential air to water heat pump that provides heating, cooling, and domestic hot water with excellent environmental performance using natural refrigerant R290. The unit has a jet black body with a silver accent, harmonizing with both traditional European buildings and modern architecture. The fan guard on the left side has a textured surface, while the right side has a smooth flat panel. It can supply hot water at 75 degrees Celsius even at -25 degrees Celsius, ensuring reliable year-round comfort.