Dampness should not be present in ducts. Controlling humidity is the most effective way to avoid biological growth in air ducts. For those who’re Not sure if duct cleaning suits your process, talk to with one of several top rated HVAC contractors in your neighborhood for advice. Dryer Vent Cleaning: https://guidemysocial.com/story3185153/the-smart-trick-of-duct-cleaning-that-no-one-is-discussing