Filter Drier HVAC System

While also not impeding the refrigerant's flow through the system. Moisture can quickly cause damage to various components in the HVAC unit, most notably the compressor.

A filter-drier in a refrigeration or air conditioning system has two essential functions: one, to adsorb system contaminants, such as water, which can create acids, and two, to provide physical filtration. Evaluation of each factor is necessary to ensure proper and economical drier design.

All filter driers should be replaced every 2 years or by manufacturer's recommendation. The Receiver Drier's function in an automotive a/c system is to filter foreign material, remove moisture from refrigerant and to act as a reservoir to supply liquid refrigerant to the TX valve.