I read an article today that said that modern AC units require a dryer built into them as HFC refrigerants like R-134a absorb water, whereas old Freon AC units did not require a dryer. Does this mean that AC units from the 50s did not dry out the air like modern ones do?
In: Physics
The reason air conditioning dehumidifies the air is not because the refrigerant absorbs water. A/C is a sealed system. If the refrigerant comes in contact with the air, it will escape the system. A/C removes moisture from the air through condensation. When warm air passes the evaporator, its temperature is reduced below the vapor point, and excess moisture condenses out.
Yes, older A/C systems had a filter-drier in them.
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