HangNing heat pump  water heater unit were batch used successfully in Shanghai Hitachi electrical appliances co., LTD., and get satisfied results.

Hangzhou Hangning heat energy technology co., LTD. And Shanghai Hitachi electrical technical cooperation, successfully developed special compressor, heat pump and the batch used in products. Hangzhou since technical cooperation, ningbo household type heat air can heat pump use special compressor (environmental protection refrigerant R417A type) series products batch on the market. Http://www.taiyangneng51.com/

This series of products, to solve the long-standing confusion air to heat pump industry (water temperature is low, the service life of the compressor can't guarantee), is a technical revolution in the air to heat pump industry. Hangzhou and ningbo heat multiple cooperation with Shanghai Hitachi electrical appliances, using special hangzhou compressor of ningbo heat pump hot water unit installed in Hitachi laboratory for joint test, since the test through persistent bad working conditions, unit, agreed by both parties and technical personnel.