Magazine article from our research archive:

How to know if it's time to clean ducts.

Air-conditioning and heating contractors often hear about duct-cleaning companies offering their services, but they may not be certain when clients actually need to get their systems cleaned.

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Here are a few pointers on what to look for and what to do.

Replace the air handler

Remember this one. When you install a new air handler onto old ductwork, you run the risk of dirt blowing from the ducts. This can get very messy. The problem is simple: The new air handler blows harder. The old fan didn't disturb the dirt lying in the ducts because it was too weak. You come along and bang on the ductwork while yanking an old unit and hooking up a ...

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