What is the best Season for Duct Cleaning? Home » FAQs » What is the best Season for Duct Cleaning? There is no best Season for duct cleaning, if there is smell coming out of your duct or if not a good air flow. Then you probably need duct cleaning. January 19, 2016 at 7:08 pm No Comments Previous Post Next Post You may also like May 29, 2016 You Guys Service or Install Ducted Heating Unit? January 17, 2016 Marks Duct cleaning provide any guarantee for the work? January 22, 2016 How we can prevent dust from accumulating in the ducts to save on future duct cleaning costs?