PRODUCT DESIGN
24
Proper Chimney
Termination?
(Check 1)
Line, terminate with
listed vent cap
(Fix 1)
No
Yes
Chimney channel
free of solid and
liquid fuel
appliances?
(Check 2)
Change venting
arrangements
(Fix 2)
No
Yes
Crown in good
condition
(Check 3)
Rebuild crown
(Fix 3)
and/or Reline
(Fix 4)
Yes
No
Yes
No
No
Reline
(Fix 4)
Reline
(Fix 4)
Cleanout free of
debris?
(Check 4)
Liner in good
condition?
(Check 5)
Yes
Yes
No
Reline
(Fix 4)
Dilution air
available?
(Check 6)
Complete the
installation.
(Check 7)
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 equipment draft hood outlet or flue collar.
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.
2' Min.
2' Min.
3' Min.
10' or Less
Wall or
Parapet
Chimney
Ridge
2' Min.
10' or Less
3' Min.
Chimney
Termination 10 Feet Or Less From Ridge, Wall or Par-
apet
Wall or
Parapet
Chimney
NOTE
: No Height
above parapet
required when distance
from walls or parapet is
more than 10 feet.
More than 10'
3' Min.
Ridge
3' Min.
Chimney
2' Min.
More than 10'
10'
Height above any
roof surface within
10 feet horizontally.
Termination More Than 10 Feet From Ridge, Wall or
Parapet