1. High Efficiency A+++ Eco-friendlyThe Hi-Master V Series can meet highest class A+++, providing our customers the best eco-friendly performance for the heat pump system. 2. R290 Natural Refrigerant Low GWP and low carbon lifeUsing the natural refrigerant R290 (with a GWP of only 3) , the Hi-Master V Series heat pump has a minimal impact on global warming and zero harm to ozone layer, making it the best choice for the low carbon heating system. Designed to optimize efficiency and reduce energy consumption, this heat pump provides customers the affordable sustainable heating solutions. 3. Quiet Operation Ensure peaceful living space for your neighborhoodThrough effective noise reduction solutions, the Hi-Master V Series ensures a sound pressure level down to 31dB(A) at 1m and 24dB(A) at 3m, lower than the sound in a library. You’ll barely notice it’s working, so your neighbors won’t be disturbed by th…