Super quality air source heat pump water heater: 1.Long operating life 2,use safely 3,high efficiency and ... , steady performance, lower voice, lower maintenance cost etc.1. Monobloc water heater heat pump, heating capacity 11000~18000BTU, COP is above 4 ... optional, power consumption is 1/4 compared with electric water heater.3. Multi-functional type: split heat pump added water tank and split ...