Mr Heater vent clearances?

[johno]

I'm installing the 45000 mr heater unit with horizontal venting, in instructions it clearly states min 1" clearance on the double walled vent pipe, got that.

BUT whats the clearance on that single walled elbow you need when coming out of the heater? I don't see that info.

Also does there need to be clearance around the thimble? My guess is no?

Appreciate your help, want to get this up next week, my frame is made, and once the above is figured out I can put up the unitrack, and get to it.

Thanks

 

[notme_76]

why not just buy a bvent elbow and not have to worry about it!

 

[johno]

why not just buy a bvent elbow and not have to worry about it!

Bought the install kit, so I already have all these parts.

 

[jumpingryan]

I know the Mr Heater kits use Selkirk pipes.

http://www.selkirkcorp.com/

Look up the SAF-T model easy seal, and then view the 3-5inch installation instructions. It says 4 inches for the size you are using (4 inches) for vertical runs and 8 inches for horizontal runs.

http://www.inspectapedia.com/chimneys/B-Vent_Chimneys.htm

I went through alot of what you are doing in my install of a sterling garage guy heater 45,000 BTU. I vented up through the roof (vertical) with 4 inch b-vent as per the manufacturer instructions. But I have a 8 inch section of single wall pipe on mine, then two b-vent elbows to get to the vertical run.

I made a 18 inch metal enclosure around my fire-stop (any vertical pipe runs need a fire stop vs using a wall thimble for horizontal runs) so I could later use blown in insulation with no problems and maintain that 1 inch clearance. The enclosure is made out of sheet metal from home depot.

I bought a kit (the Mr Heater 4 inch venting kit) on the hope I could mix and match parts, and it really was a big waste of money for me. I did end up using the roof flashing.... but if I had to do it over, I would just buy the parts..... as well, my local supplier that I found after I bought the kit prefers Simpson venting, as it is alot more install friendly.

I have no screws in my system, just twist and lock. Very simple, very secure. The connection to my heater is joined with both high temp silicone and metal tape for added security. This final connection is where I have 8 inches of single wall vent (26 gauge) with a Simpson b-vent to single wall pipe connector.

Now that I have the flue finished, I am still working on getting the gas/electrical in place. The weather has been good here, so I am kinda dragging my feet a little......

I will likely bring in a pro to do the gas piping, although I plan on doing the drilling, and rough in's myself. The father in law is an electrician, so he will be helping me with that.

Ryan

 

[Shocker]

So, I have quite a bit of clearance around the elbow that comes out of the heater. Mine is mounted at an angle with the elbow out so there is a lot of clearance from the wall.

You need 18" minimum from the wall so that essentially gives you quite a bit of space around the elbow.

No real clearance around the thimble. I have mine pretty much touching the siding. No issues. Not even hot to the touch, but I am also using all B-vent from the elbow out through the thimble.

 

[johno]

So, I have quite a bit of clearance around the elbow that comes out of the heater. Mine is mounted at an angle with the elbow out so there is a lot of clearance from the wall.

You need 18" minimum from the wall so that essentially gives you quite a bit of space around the elbow.

No real clearance around the thimble. I have mine pretty much touching the siding. No issues. Not even hot to the touch, but I am also using all B-vent from the elbow out through the thimble.

What do I need 18" of clearance on?
Haven't seen that number in the literature.

 

[Shocker]

You need 18" of clearance from the back of the unit to the wall.

Top of page 5 of the owners manual on the right column. There is a chart there.

Unit Clearances. 18" from the rear of the unit.

 

[johno]

You need 18" of clearance from the back of the unit to the wall.

Top of page 5 of the owners manual on the right column. There is a chart there.

Unit Clearances. 18" from the rear of the unit.

You're right it does, I missed that, thanks.