OWUTEC Conventional Heat Pump Galvanized Steel Casing,anti-rust painting,with different colors optional. Fan motor defrost, even compressor not runs or without 4-way valve,the fan motor can run to defrost. Well-know brand fan motor and optimized fan blade,anti-vibration forward design,effectively reduce the air vibration and disturbance.Heating only or heating & cooling, provides the most economical pool heating solution.