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Reply to "Sears air duct cleaning scam "
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[quote=Anonymous][quote=Anonymous][quote=Anonymous]Ok verdict? Air duct cleaning never needed?[/quote] Without doing research, I would guess no unless something very unusual is going on. While dust etc can collect on the interior walls of a duct, it will remain there. Air velocity at the wall of a duct is low (almost zero since it's a boundary), so interior duct walls are always "dusty." You need turbulent flow to scour the walls and for rigid duct systems that's uncommon IMHO. For mold growth in there to release spores, you need damp. In winter, with low humidity and high temperature air, that doesn't happen. In summer, the cool air has already dumped the moisture at the evaporator. Cleaning the interior coils is something you should do periodically. It gets damp, collects dust (because filters aren't perfect) and will sit there wet after the blower shuts down.[/quote] Any dust stuck to the walls of your ducts will stay here. Unless you bang on the ducts while air is going through it. Duct cleaning is a huge scam. You would need to send a tiny little creature in there with a brush to crawl through the entire length of your ducts and scrub it off and collect it. UV lights in a duct DO NOT DO ANYTHING! You can kill mold and bacteria with UV light but it's not going to do anything to the air passing through. White stuff in a humidifier is lime deposits from the minerals in your water. Use a water softener and you won't have that (but you will have salt deposits). Most mold remediation is also a big scam. There are certain types of mold that are deadly out of the 100s of molds out there. It's highly unlikely you have that kind of mold. Mold needs a moist organic surface to grow. Get rid of the moisture and mold goes dormant. Or, pay someone to kill it and it will just return again if you don't address the moisture problem.[/quote]
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