Duane Sewell Duane Sewell Search | Advanced Search | New Members | Coupons and Discounts | All Categories To ensure the technician can contact you, please enter your email accurately and consider adding your phone number in the message body. KEY Hover over each icon to see a description of the program. Certified Chimney Sweep Certified Dryer Exhaust Technician Advanced Inspection & Documentation Chimney Physics Chimney Physics ONLINE Diagnosis & Documentation Inspection & Report Writing Installing & Troubleshooting Gas Hearth Appliances Installing & Troubleshooting Woodburning Hearth Appliances Lining Masonry Chimneys with Stainless Steel Masonry Repair for Chimney Professionals National Chimney Sweep Training School Please note that this resource is intended as a public service for homeowners and others wishing to locate a professional or verify CSIA credentials. This list is not intended for marketing or other business development purposes.   Advertising & Media >> CSIA Certified >> District of Columbia Duane Sewell 1140 3rd St NE Suite 200Washington, DC 20002 | map | directions (301) 651-0559 Related Organization DMV Professional Service Send a message to: Duane Sewell Your Name: Your Email: Subject: Message: (Date: 11/29/2022) To ensure the technician can contact you, please enter your email address accurately and consider adding your phone number in the message body.