A Class Chimney question. Straight but tall above roof or offset in attic?

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rnettleship

New Member
Nov 4, 2021
4
New Jersey, USA
I am interested in swapping out a Heatilator, see-through gas fireplace for a wood burner. My home is a cape style with no dormers on the back of the house. The existing unit sits between our living room and kitchen and is only 6 feet from the back wall of the house. Existing direct vent pipe goes straight up through the roof. Roof pitch is 8/12.

Based on what I read, to maintain proper clearances above the roof I would need A Class pipe to be approximately 104" tall. Other than the aesthetics of having such a tall chimney, are there concerns regarding how it would draft? It would not extend higher than the homes ridge but be close.

My other thought would be do run more of the chimney in my attic, towards the peak but that would require at least 3, 30 degree offsets and still have at least 6' feet exposed above the roof.

Do either of these approaches sound reasonable or effective?

Nettleship_Heatilator.jpg
 

moresnow

Minister of Fire
Jan 13, 2015
1,913
Iowa
Is the current heatilator position your only option for a wood stove? Anything more centralized seem reasonable?
 

begreen

Mooderator
Staff member
Nov 18, 2005
91,301
South Puget Sound, WA
The attic offset is ok as long as it is supported with hangers. I'm puzzled about the need for 3 instead of two 30º elbows. Offsets require 2 elbows of the same angle.
 

rnettleship

New Member
Nov 4, 2021
4
New Jersey, USA
The attic offset is ok as long as it is supported with hangers. I'm puzzled about the need for 3 instead of two 30º elbows. Offsets require 2 elbows of the same angle.
I don't have a straight shot to the peak so I would need to angle around the current chase. I guess maybe I could cut diagonally both upward and towards the side of the house