Domestic / Commercial Heat Pump Water Heating System Domestic / Commercial Heat Pump Water Heating System Heat Pump Principle Features and Benefits of Heat Pumps Rapid recovery. With a heat pump water heating system, since the main source of energy is hot air, it consumes less energy than a conventional water heater for the same amount of water and the same temperature. The costs involved are. 1/4 of the cost of an electric water heater 1/3 of the cost of a gas water heater 1/2 the cost of a diesel water heater Best Environmental Equipment. Does not destroy the ozone layer and uses environmentally friendly refrigerant. No consumption of natural resources and no pollution. HP-1000 (1 ton) HP-1200BP (1.5 tons) HP-1800WT (2 tons) By-product “Cold Air” In the case of 84,000 BTU, it can provide about 4.9 tons of cooling air which saves 4.9 kWh of electricity/H.