... .Reliable system, 4.CE.CB, SAA,C-TK Swimming pool Equipment (heat pump) More safe and durable:Adopting advanced titanium heat ... the units COP reach as high as 4.5.Extensive application:it is suitable for hotel, hospital, factory, restaurant, school, sauna ... condition: Outdoor DB temp: 24/19, inlet temp27. swimming pool equipment (heat pump water heater)