Do you guarantee your work ? September 29, 2014 No Comments I have a Customer Satisfaction Policy if you are not satisfied, I will re-clean your duct system free of charge. Previous Post Next Post You may also like September 29, 2014 My heater does not work can you recommend a qualified tradesman? September 29, 2014 Do you sell the covers or grilles that go over my floor duct outlets? March 12, 2015 Can you do carbon monoxide testing?