Where to vent rmh

I am building my home out in Montana, close to
Missoula. We are getting close to putting on our roof, which has brought up a question… vertical or horizontal chimney?

It seems that the less penetrations in a roof, the better. We will have a couple for bathroom fans and such, but what about exhaust for the rmh? Could we do a 45 degree exhaust tube that exits the house at the top of the wall?

I appreciate any insight into this question.  

Curious why bathroom fans must vent through the roof while you are considering not venting the RMH through the roof.

You will need the chimney wherever it is to be two feet higher than any roof within ten feet; If the roof has much slope that could be a tall exposed structure which will probably need to be braced to the roof. If you can exit with the chimney very near the roof peak, you will have the best possible draft with the least exposed chimney structure. A penetration near the top of the roof will have the least potential runoff to have to divert, so lowest risk.

A 45 degree wall exit would be good for airflow, but would direct water down the exterior slope right against the wall, requiring the same level of waterproofing as a roof penetration.

Hi Scott;
I agree with Glen.
Putting the chimney thru the roof as near the peak as possible is your best plan.

Glenn and Thomas,

I appreciate the information. Roof chimney it is!

Thanks