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 No Comments Previous Post Next Post You may also like April 12, 2017 Is it required to have the air ducts cleaned for a new home? January 23, 2016 How do I need to make the payment? January 21, 2016 Are all your cleaning experts insured?