... and economical Super quality air source heat pump water heater:Yieldhouse(China)-As a professional new energy-saving products ... is under 1/4 compared with electric water heater .2. Split water heater heat pump, heating capacity from 13000BTU--180000BTU, ... constant temperature swimming pool, sauna, heating system , bathing spot, bathtub, public bath, hotel, school, koi ponds etc. Super quality air ...