Heat Pump Water Heater (HPWH) is the most energy-efficient water heating device. Owing to the global awareness on energy saving and the reduction on CO2 emission, HPWH, particularly the air source heat pump water heater, becomes a hot topic in hot water industry, and more and more heat pump water heater manufacturing companies have been founded, particularly in the recent years. However, there are always this-or-that kinds of problems, and/or imperfections on the majority of the heat pump water heaters (e.g., the reliability and the life of the units are still the problem for most of the heat pump companies). To help this industry growth healthily, this paper firstly presents the main requests on Heat Pump Water Heaters by Australian Standards, and then introduces some characteristics of Quantum heat pump water heaters (domestic models) and other Quantum heat pump hot water systems.
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