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 How much dust accumulates in a central heating system? March 12, 2015 Can you do carbon monoxide testing? September 29, 2014 How often should residential HVAC systems be cleaned?