gtblum Posted January 27, 2009 Report Share Posted January 27, 2009 Is this an off the shelf setup or the work of a tin knocker expressing himself? Click to View 42.34 KB Click to View 78.07 KB He forgot a part. Good thing I'm short. Click to View 67.1 KB Link to comment Share on other sites More sharing options...
Neal Lewis Posted January 27, 2009 Report Share Posted January 27, 2009 I've seen them quite a few times, usually due to height limitations. I believe it's an off the shelf piece. Forget the name. The bottom is supposed to be open. It is installed instead of the draft hood. Link to comment Share on other sites More sharing options...
energy star Posted January 27, 2009 Report Share Posted January 27, 2009 What is it? Combustion air? Link to comment Share on other sites More sharing options...
gtblum Posted January 27, 2009 Author Report Share Posted January 27, 2009 Originally posted by Neal Lewis I've seen them quite a few times, usually due to height limitations. I believe it's an off the shelf piece. Forget the name. The bottom is supposed to be open. It is installed instead of the draft hood. Thanks Neal. How does it work? Link to comment Share on other sites More sharing options...
Bill Kibbel Posted January 27, 2009 Report Share Posted January 27, 2009 It's an external draft diverter for older systems that aren't manufactured with an integral draft hood. Link to comment Share on other sites More sharing options...
Darren Posted January 28, 2009 Report Share Posted January 28, 2009 OK gentlemen, what would you say about this. The fuel gas code requires a 12 inch straight riser off the draft hood, or in this case the connection to the unit No? Link to comment Share on other sites More sharing options...
Neal Lewis Posted January 28, 2009 Report Share Posted January 28, 2009 Never heard of such a thing, except over at IN.[] Link to comment Share on other sites More sharing options...
Darren Posted January 28, 2009 Report Share Posted January 28, 2009 Actually Neal, I thought the same as you. However, when I attended the seminar titled "Chimneys and Vents' I asked Mr. Ballanco straight out, is a 12 inch riser required when attaching to a draft hood. He stated something like; it's a code requirement, but I wouldn't worry if it's not a true 12 inches, as long as the exhaust is able rise, 8 or even 6 inches would be OK. Can you connect an elbow to the draft hood, No! Like this beauty here... Click to View 37.5 KB Link to comment Share on other sites More sharing options...
Brandon Whitmore Posted January 28, 2009 Report Share Posted January 28, 2009 I'm with Neal on this one. I have not seen any code reference showing the 12" requirement, unless it is based on manufacturers installation instructions. Link to comment Share on other sites More sharing options...
JEuriech Posted January 28, 2009 Report Share Posted January 28, 2009 I have not found anything in the code about a 12" vertical rise for a single vent pipe. However, for two or more appliances on one vent pipe there is reference to a connector rise in feet depending on vent pipe height. See IRC 2006 G2428.3 (504.3) and table 2428.3(1). Appendix "B" also has some diagrams showing the different connector rises for two appliance into one vent pipe. Jeff Euriech Peoria Arizona Link to comment Share on other sites More sharing options...
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