The system follows Carnot cycle principle. Driven by Electricity, its working substance absorbs the latent heat in the air or other low-temperature heat source, and waste heat let out of living or industry, compresses it to heat by compressor, exchange, exchange heat with water to higher the water temperature, 1 electricity can produce heat equal to 4 electricity. Its a new water heating apparatus.
According to utilize different heat source, heat pump water heaters are classified into ground source heat pumpwater source heat pumpair source heat pump, air source heat pump is the most widely used.