Munchkin Vent Termination

Tim_31

If you look in the Munchkin manual, please check out the diagram showing the roof termination. Even with the concentric vent they show this 10' clearance to the slope of the roof. I can't see where it would ever work unless you terminate close to the ridge.

Anyway, I decided to vent out the side wall after much head scratching. There was no way to go up through the roof because I couldn't do it without exceeding the 85' limit. I would have preferred to exit on the roof. Don't like plumes of flue gas shooting out the side of the house.

Tim_31

Vent Termination

The Munchkin manual shows a 10' horizontal distance for the air intake when you vertically vent through the roof. I've got a 10/12 roof slope and that means sending both intake and exhaust way up into the sky.

How important is this 10' horizontal clearance?

J.C.A._3

Why not....

Save yourself the trouble and run the concentric vent kit? You'll only have to make 1 roof penetration and lessen the chances of a leak. The manuals are pretty explicit in how far you can run these kits but unless your over 4 stories I don't think there will be too many problems, Less turns= more height! Chris

Tim_31

Concentric vent

Thanks for your reply.

If I read the "Diagrams for Vertical Venting" right out of the Munchkin installation manual correctly, it says the concentric vent has the same 10' min. clearance horizontally. Unless you're going out a fairly shallow pitched roof like 3 and 12 or 4 and 12, you've really got to send this thing way up into the sky. In that case, you'd have to run 2- 2" lines or 2- 3" up through the roof and then have the concentric "wye" hanging up there in the sky.

Am I missing something?

Guy_6

vent

It's been a while since I looked at that, but I BELIEVE that the exhaust is technically supposed to be 10' from the pitch of the roof. That is usually nearly impossible unless you have a nearly flat roof.
Check with the boys in tech. on Monday,even fax over a sketch of what you would like to do (508-763-4909) but as I always said-use the common sense rule. You don't want snow over either pipe, and you want the exhaust at least 12 inches higher than the intake.

Tim_31

Impossible

So, if that's impossible, how can a person vent through any home with a pitched roof? Most homes around here have a decent pitch to them for the occasional snowfall.

Is the diagram in the Munchkin manual an industry standard or something that HTP has decided is best for their equipment?

Steve Ebels_3

Use a concentric vent

I believe a concentric requires less clearance than normal two pipe venting. You have to pay attention to height requirements concerning getting the intake portion of the vent above anticipated snow levels. With a 10/12 pitch however, I don't think snow buildup will be a problem.
The "barrel" of a concentric is usually about 30" long which allows you to run the two pipe portion of the vent inside the attic and attach to the concentri below the roof.
Check with HTP for sure.

Wayco Wayne_2

On a 10/12 pitch

you would have to go 7.5 feet in the air to get a 10 foot horizotal. That's pretty high up there. if you were closer to the peak of the roof you could get by I guess. Common sense sez it's too much. WW

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PM_2

vent near the ridge

If at all possible, have the vent exit the roof near the ridge. The horizontal 10' requirement goes away. Also, if you are in snow country and have a steep pitch an metal roof, the odds of having the vent damaged by sliding snow are almost zero. You should see all of the "vent out the wall then turn up and run past the eave" wood stove flues laying on the ground in the spring up here.