Variable refrigerant flow (VRF) systems were first introduced to the HVAC community in Japan in 1980 as a highly efficient heating and cooling option in multi-zone comfort applications. It took the ...
The air365 Max with HeatForce, from Johnson Controls-Hitachi Air Conditioning, has an Energy Efficiency Ratio (EER) of up to 12 as well as a Coefficient of Performance (COP) of up to 4.2 without the ...
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