... use4.No emission of hazard gasLarge application:It is suitable for family,villa,apartment,high-floor residence,business restaurant,hotel and ... boilerLarge applicationIt can provide heating and hot water for commercial places where need much hot water and heating.Such as school,factory, ... ¾¾¾¾Rated circulating water flow0.8 m³1.2 m³1.5 m³3 m³ CE ISO Certificate Water To Water Heat Pump For Family Use