Here’s another one I’ve heard both ways from inspectors:
Clearance to combustible materials–for whatever, a listed stove or vent pipe for instance…
Say it’s 6 inches.
I’ve had one guy tell me that if there’s a ‘non combustible’ material between the pipe and that stud behind the wall, then you’re fine. Seems like this is bunk–you can’t just put something between the hot item and your framing and get away with it?
Like : pipe — 4″ air — 3/4″ of stone and tilebacker then a stud.
Is that stud a ‘combustible material’ within 6″ of pipe and should the inspector fail it?
I ask because I’m installing a tankless water heater. Manual clearly shows, and it’s plain obvious, that you screw the thing to the wall. Curious thing is, the listed vent pipe, made by it’s manufacturer, calls out a 3″ clearance to combustible material, which, by nature of the unit mounting flat to the wall, puts the pipe 1 1/2″ from the sheetrock–and 2″ from the stud behind it.
What gives?
“Research is what I’m doing when I don’t know what I’m doing…”
Replies
Put a heat shield between vent pipe and wall or space the heater out to maintain clearance.
Solar & Super-Insulated Healthy Homes
Figured I would, but very bizarre that the unit is meant to be mounted directly on the wall--but their own venting requires more clearance."Research is what I'm doing when I don't know what I'm doing..."
I've had one guy tell me that if there's a 'non combustible' material between the pipe and that stud behind the wall, then you're fine.
That is not going to fly with any inspector I've dealt with.
In fact I've had one grumble about durarock on the studs,
even tho It was just over kill. As I already had prerequisite
clearance.