... It can still work when the air temperature is -5oC, and provide 60oC hot water.Features:1. Environment friendly: no air ... 1kWh,save 50~80% electric costs; no fuel transportation costs and low maintenance costs3. Convenient: modular design, produce heat up ... . Suitable Places: hot water supply for Hotels, Villas, Hair Salon, Foot Massage, etc; hot water source for swimming pool, factory , farm, etc.6. ...