Oil Furnace Flue Clearance

[Joe Funderburk, CMI]

I've searched the old BBS and can't find the answer. Can you kind folks guide me to the IRC code for clearance to combustible for an oil furnace connector? (Is the proper word connector or flue?)

Please see the attached photo. Furnace is new. I think the pipe is single wall and it touches the floor joists above.

I think it's table M1803.3.4 that I need to reference, which would require 9 to 18 inches but I'm not sure.

Thanks.

[Brian E. Kelly]

Originally Posted by jfunderburk

I've searched the old BBS and can't find the answer. Can you kind folks guide me to the IRC code for clearance to combustible for an oil furnace connector? (Is the proper word connector or flue?)

Please see the attached photo. Furnace is new. I think the pipe is single wall and it touches the floor joists above.

I think it's table M1803.3.4 that I need to reference, which would require 9 to 18 inches but I'm not sure.

Thanks.

Attachment 1642

Single wall flue 1" dbl wall 6"

[Joe Funderburk, CMI]

Originally Posted by bkelly2

Single wall flue 1" dbl wall 6"

Thanks Brian. But I think you reversed it accidentally. However, for my future reference, where is that stated???

[Brian E. Kelly]

Sorry T2427.7.7 according to code check for 03 irc