This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Chimney
UL103, UL103HT, and UL2561 Rated
Single Wall Clearances
| Single Wall Chimney Diameters |
Single Wall Chimney Thimble Assembly Shell Diameter (Thru Penetration) | Single Wall Chimney Thimble Assembly Clearance To Combustibles (Shell to Joist) | UL103 - Clearance To Combustibles (Single Wall Chimney to ceiling) | UL2561 - Clearance To Combustibles (Single Wall Chimney to ceiling) | Clearance To Non-Combustibles | Through Floor Opening |
|---|---|---|---|---|---|---|
| 5" | 9" | 2" | 18" | 36" | 0" | 13-1/2" |
| 6" | 10" | 2" | 18" | 36" | 0" | 14-1/2" |
| 7" | 11" | 2" | 18" | 36" | 0" | 15-1/2" |
| 8" | 12" | 2" | 18" | 36" | 0" | 16-1/2" |
| 10" | 14" | 2" | 18" | 36" | 0" | 18-1/2" |
| 12" | 16" | 2" | 18" | 36" | 0" | 20-1/2" |
| 14" | 18" | 2" | 18" | 36" | 0" | 22-1/2" |
| 16" | 20" | 2" | 18" | 36" | 0" | 24-1/2" |
Double Wall Clearances
| Double Wall Chimney DW-2R HT Diameters | Double Wall Chimney Thimble Assembly Shell Diameter (Thru Penetration) | Double Wall Chimney Thimble Assembly Clearance To Combustibles (Shell to Joist) | Clearance To Non-Combustibles | Through Floor Opening |
|---|---|---|---|---|
| 5" | 9" | 2" | 0" | 13-1/2" |
| 6" | 10" | 2" | 0" | 14-1/2" |
| 7" | 11" | 2" | 0" | 15-1/2" |
| 8" | 12" | 2" | 0" | 16-1/2" |
| 10" | 14" | 2" | 0" | 18-1/2" |
| 12" | 16" | 2" | 0" | 20-1/2" |
| 14" | 18" | 2" | 0" | 22-1/2" |
| 16" | 20" | 2" | 0" | 24-1/2" |
Product Resources
The Single Wall and Double Wall Chimney Series have been certified by UL. This certification mark indicates that the product has been tested to and has met the minimum requirements of a widely recognized (consensus) U.S. Product safety standard, that the manufacturing site has been audited, and that the applicant has agreed to a program of periodic factory follow-up inspections to verify continued performance.
Model DW (Single Wall) and model DW-2R Type HT (Double Wall) is UL Listed under file number MH60233 and complies with UL103, UL103HT, UL2561, CAN/ULC-S629-M87 (Double Wall), and ULC/ORD-C959-1993.