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Question DetailsAsked on 11/25/2015

Is a HVAC cleaner system necessary to keep out dirt and gunk? My AC maintenance guy wants to charge me $1980.

I have two homes, and the company that services the heater/ac states I need to install a HVAC System Cleaner. The rental he said is clogged, and the renters are breathing bad air. I installed a brand new unit there about 7years ago. In my primary home, I had a new unit unit installed 2.5 years ago, and they are saying the same thing here. Are those really necessary?

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1 Answer


Just offhand, without details of specifically WHAT type of system he is talking about or WHY he said you are getting "bad" air, my gut feeling is I smell a scam. Some HVAC contractor sell either functional but unnecessary or totally junk "cleaners" as an upsell just ot make money. THere are good and bad people in all businesses, and HVAC if no different.

A normal forced air system with good quality (and properly sized and replaced when needed) filters will do fine in most environments. In very humid areas, the air conditioner can cause air quality problems due to mildew and mold forming on the air conditioner evaporator coils (commonly inside the ducting near the furnace in central system, but can be in a separate air handler unit with fan), In that case, if periodic manual cleaning of the evaporator coil does not control it adequately, then an higher efficiency air filtration system and/or ultraviolet light system to continuously kill the growth on the coil may need to be installed.

I would certainly pay the money to have a second HVAC contractor inspect your system and see what they say WITHOUT telling them what the other guy said. Basically, if you are not getting mold or "dirty sock syndrome" smell from your ducts and your annual cleaning is not showing significant mold/mildew growth on the coil, likely not needed.

Answered 4 years ago by LCD

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