The lubricant in refrigeration and air conditioning systems has many important functions. Even though the circulated refrigerant is the working fluid required for cooling, the lubricant or oil is ...

They consist of a conventional compressor type unit outside the house, an air handler in the attic, and the mini-ducts, which are 3 inches in diameter, branching off main attic trunk duct.

Tip #5: Drain Moisture from the Tank. Air compressors have a receiver tank, which is responsible for collecting the moisture from the air that accumulates while the compressor is in use.