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 24, 2016 Can you provide heater unit servicing for residential ducts? April 12, 2017 Why duct cleaning is important? January 24, 2016 Why do I need duct cleaning?