CHECKLIST SUMMARY
This checklist serves as a summary of the items to be checked before venting an Air Command 80 furnace into a masonry chimney. In addition, we recommend that a quali- fied serviceman use this checklist to perform a yearly inspection of the furnace venting system.
This checklist is only a summary. For detailed information on each of the procedures mentioned, see the paragraph referenced with each item.
This inspection is based upon a draft topical report, “Ma- sonry Chimney Inspection and Relining”, issued by the Gas Research Institute. While not yet finalized, we believe this report represents the best information on this subject which is currently available.
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 require- ments, 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, page 12.
Proper Chimney
Termination?
(Check 1)
Yes
Chimney channel free of solid and liquid fuel appliances? (Check 2)
Yes
No
No
Line, terminate with
listed vent cap
(Fix 1)
Change venting arrangements (Fix 2)
10' or Less
2' Min. 2' Min.
3' Min.
Wall or |
Parapet |
Chimney
Crown in good
condition? (Check 3)
Yes
Cleanout free of debris?
(Check 4)
Yes
Liner in good condition? (Check 5)
Yes
Dilution air available? (Check 6)
Yes
Complete the installation. (Check 7)
No
No
No
No
Rebuild crown (Fix 3)
and /or Reline (Fix 4)
Reline (Fix 4)
Reline (Fix 4)
Reline (Fix 4)
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Chimney
Figure 9
Termination 10 Feet Or Less From Ridge,
Wall or Parapet
9
