Yes, we do sanitize the duct after the cleaning process. We sanitise the entire duct systems using tea tree oil. We have highly qualified, certified, and extremely experienced duct specialists who are well trained to perform the duct cleaning. Our duct cleaning process eliminates all bacteria, allergens, fungal matter and airborne foreign particles. And after the entire cleaning process, the experts do not forget to deodorize and sanitize the ducts. Call us today and get our best duct cleaning services.