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 January 19, 2016 at 7:08 pm No Comments Previous Post Next Post You may also like January 23, 2016 Do you perform carbon monoxide testing too? January 17, 2016 Marks Duct cleaning provide any guarantee for the work? March 8, 2018 What if I don’t get professional duct cleaning for my ducts?