Does an air conditioner have a negative influence on air quality?

"If the air conditioner has been properly maintained then it will have no influence on air quality. If for example a filter hasn't been replaced for a long time, or other maintenance has not been performed, than an air conditioner can produce dirty air."

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juan carlos 02-05-2024
conventry modelo cos32h11l
I wanted to know what Frigorias it is and the diameter of the reversing valve pipes.

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