John Dirks Jr Posted March 10, 2011 Report Share Posted March 10, 2011 Oil fired boiler. I'm sure I have 'em nailed with less than 18" from several angles but what about where they use sheet metal to block from the wall studs. Does that solve the clearance problem or is it a lame attempt to bend the rules? Click to Enlarge 34.29 KB Click to Enlarge 31.87 KB Click to Enlarge 33.92 KB Quote Link to comment Share on other sites More sharing options...
Robert Jones Posted March 10, 2011 Report Share Posted March 10, 2011 To me it looks like even with that metal "shield", the 18" rule is still in play. Wood is a combustible surface, it is exposed and less than 18" away in your pics. Now let the experts come slap me away:) Quote Link to comment Share on other sites More sharing options...
John Dirks Jr Posted March 10, 2011 Author Report Share Posted March 10, 2011 To me it looks like even with that metal "shield", the 18" rule is still in play. Wood is a combustible surface, it is exposed and less than 18" away in your pics. Now let the experts come slap me away:) I did some digging in my 06 IRC and found a table that allows for reduction in minimum clearances based on the use of certain materials such as sheet metal for one. However, no combination listed allows it to be as close as that one is, right up against the wall like that. Not even L vent on L vent rated appliance. I'm pretty sure it's wrong wrong wrong. Quote Link to comment Share on other sites More sharing options...
John Kogel Posted March 10, 2011 Report Share Posted March 10, 2011 John, I believe a proper heat shield needs to be spaced away from the wood with at least a 1" air gap. A proper heat shield can reduce the distance from 18" to 12" for wood heat. Oil heat maybe a bit less. Nothing like that mess you've got there. Quote Link to comment Share on other sites More sharing options...
Darren Posted March 10, 2011 Report Share Posted March 10, 2011 John NFPA 31 Chapter 10 has all the reduction requirements. Careful; it'll baffle your mind... Quote Link to comment Share on other sites More sharing options...
Chad Fabry Posted March 10, 2011 Report Share Posted March 10, 2011 FYI, gypsum wallboard is not considered non-combustible. Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted March 10, 2011 Report Share Posted March 10, 2011 I don't see the problem, it'll self-clearance eventually[:-dev3] Quote Link to comment Share on other sites More sharing options...
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