EXTERIOR MASONRY CHIMNEYS - CATEGORY I FURNACES ONLY
Proper Chimney
Termination?
(Check 1)
Chimney channel free of solid and liquid fuel appliances? (Check 2)
Crown in good
condition (Check 3)
Cleanout free of
debris?
(Check 4)
Liner in good condition? (Check 5)
Change venting arrangements (Fix 2)
Rebuild crown
(Fix 3)
and/or Reline
(Fix 4)
Reline (Fix 4)
Reline (Fix 4)
If the chimney does not meet these termination requirements, but all other requirements in the checklist can be met, it may be possible for a mason to extend the chimney. If this will not be practical, see Fix 1.
| 10' or Less |
2' Min. | 2' Min. |
3' Min.
Wall or
Parapet
Chimney
10' or Less
2' Min.
3' Min.
Chimney
Termination 10 Feet Or Less From Ridge, Wall or Parapet
More than 10’
3’ Min.
Dilution air available? (Check 6)
Complete the
installation.
(Check 7)
Reline (Fix 4)
Wall or Parapet
Ridge
NOTE: No Height above parapet required when distance from walls or parapet is more than 10 feet.
More than 10’
10’
2” Min.
Chimney
Height above any roof surface within 10 feet horizontally.
3’ Min.
CHECK 1 - PROPER CHIMNEY TERMINATION.
A masonry chimney used as a vent for gas fired equipment must extend at least three feet above the highest point where it passes through the roof. It must extend at least two feet higher than any portion of a building within a horizontal distance of 10 feet. In addition, the chimney must terminate at least 3 feet above any forced air inlet located within 10 feet. The chimney must extend at least five feet above the highest connected equip- ment draft hood outlet or flue collar.
Chimney
Termination More Than 10 Feet From Ridge, Wall or Parapet
CHECK 2 - ANY SOLID OR LIQUID FUEL APPLIANCES VENTED INTO THIS CHIMNEY CHANNEL
Solid fuel appliances include fireplaces, wood stoves, coal fur- naces, and incinerators.
12
