Air Duct Cleaners

The air in my house smells damp–should I get the ducts cleaned?

j asked: I got a brand-new air handler (heat pump) in my house 1.5 years ago (Feb. 2007). When I turn on my a/c, sometimes the air in my house smells damp (though it’s not, really). Or maybe it’s just cold? Does this mean that some part of the system needs to be cleaned, like [...]