Cold Room Air-cooled Compressor Condensing Unit Piston type,high quality . Cold Room Air-cooled Compressor Condensing UnitHZC series air-cooled compressor condensing units:* Hangzhou high-quality Copeland compressor, 99% of its efficiency in the new oil separation system, the unit is turned on without lubrication* Compact structure, stable operation, little vibration, low noise, lightweight ...