Mitsubishi Heavy Industries Thermal Systems, Ltd. (MHI Thermal Systems), part of the Mitsubishi Heavy Industries Group, has expanded its “Hydrolution EZY” series of air-to-water heat pumps for the European market with two new models using the natural refrigerant R290. The new 6 kW and 7.1 kW monobloc-type units are set for release this winter.
Designed to replace fossil-fueled boilers, the new ATW systems offer heating, cooling, and domestic hot water supply by extracting heat from the air. As monobloc units, they house the water heat exchanger in the outdoor unit, requiring only water piping for installation, unlike split systems that require refrigerant pipe connections.
The units operate with R290 (propane), a refrigerant with low environmental impact and high energy efficiency, aligning with tightening European regulations. The models are capable of maintaining a flow temperature of 75 °C in ambient conditions ranging from -25 °C to 43 °C, enabling operation in cold climates. Sound pressure levels are as low as 34 dB(A) at maximum output for the 6 kW model, with a quiet mode available to meet local noise restrictions.
Safety features include a refrigerant leak detection sensor that stops the unit and activates a fan in the event of a leak. The units also feature a redesigned black exterior with a silver accent to suit various residential environments.
MHI Group aims to support carbon neutrality through its MISSION NET ZERO initiative, targeting net zero CO2 emissions across its operations and customer applications by 2040.