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 25, 2016 When do you close? January 23, 2016 What if I am not Satisfied? June 17, 2018 Do you provide duct sealing services?