Originally Posted by Unassisted
I've always thought HVAC duct cleaning was a snake oil proposition, particularly for those who use good quality air filters on their return air. The benefits of it are impossible to measure.
Dryer vent cleaning does seem like a good idea.
This is my take on it as well.
We went through an episode of bird's nests in the dryer vents. So I check those fairly often and when I see suspicious bird activity.
My wife buys a stack of return air filters and I replace them about once every month or so. Mostly because I'm cheap and it helps the heat pump do its thing and keep my CG+E bill down (it will always be my CG+E bill, not Cinergy and not Duke).
I've heard the HVAC cleaning thing is good if your household has a lot of allergy problems. But since we don't, I just look at it as a way for the heating/cooling guy to make a buck off me.
And I think a contributing factor to why we're healthy and allergy-free is because we tolerate a little dirt and dust in the house and aren't microbe-phobic and live in an allergen-free bubble.