| 摘要 |
High-efficiency heating unit for producing hot water, which includes in combination a heat pump (1) which exploits the thermal energy of the sun and/or that of the environmental air for heating water or for producing sanitary water, namely warm water, and an electric burner or boiler (2) for possible supplementary heating of the heated water or water preheated by the heat pump and designed either to be supplied to a heating system or for sanitary use. |
