9kW/12kW/16kW/21kW R290 Air to Water DC Inverter Heat Pump 55℃ A+++ The SINGFUN heat pump is ultra-high energy efficiency, energy-saving level up to A+++ , SCOP>5.0, eco- friendly natural R290 refrigerant, with a specific low global warming potential value of GWP=3, and can heat hot water up to 70℃.…