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 26, 2016 What is your process for central duct cleaning? April 12, 2017 Why duct cleaning is important? August 18, 2018 Are you guys working on weekends too?