Pressure water tank:central water supply, Automatic operation. NO1 Instant pressurized heating pump water heater: 1. Special structure make it nice elegant, different ... saving: For example, NRP(Normal Rated Power)1.26KW, tank volume 100liter, surrounding temperature5°C, 50liter/people, output water45° ... is under-10°C, save 35% than electrical water heater. NO1 Instant pressurized heating pump water ...