Do we have to cover all of our furniture before you come out to clean the ducts ? September 29, 2014 No Comments No because the dust is kept down to a minimum. Previous Post Next Post You may also like September 29, 2014 Do you sell filters for the return air vents? September 7, 2017 How can duct cleaning improve the air quality inside the house? September 29, 2014 Can we use our heater straight away after it has been cleaned?