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CLEANING DUCTS MAKES SENSE

Q. I've seen a lot of ads and commercials lately on cleaning hot-air ducts. Is it really necessary? My house is 12 years old and the ducts are used for heating and air-conditioning. J.G., Hanover

A. Maybe yes, maybe no. Let's put it this way. Duct cleaning is a new industry, now that more efficient brushes and vacuums have been developed, and the people who do the duct cleaning would love to do it regularly, to keep the ducts nice and clean. After all, ducts do collect dirt and other contaminants that we really don't want in our lungs.

The dirt and other things that line the ducts are often stuck to the sides, and the air is not necessarily going to slough off all those contaminants as it ...

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