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 January 24, 2019 Do you guarantee your duct cleaning work? June 2, 2016 Is your duct cleaning company use antimicrobial chemicals? May 6, 2019 How many years of experience do you have in duct cleaning?