Direct vent into vertical chase to roof - is a 24" rise at stove required before elbow to horizontal?

[bakingfool]

I am building a new home, and a gas stove with direct vent will be on an interior wall. A few stoves I am considering have rear vent as an option, and I thought it would be clean to run the pipe out of the back horizontally a few feet into a chase where a 90 degree elbow changes to 10 foot vertical run and through the roof.

Someone at a stove shop said "you have to go vertically up at least 24" before transitioning to horizontal. Then through the wall, and the elbow to change to vertical."

In looking at stove manuals, I see the snorkel requirement for "through the wall" installations, that provides said vertical rise outside in other to get proper draft.

My question is, is there a general rule that for direct venting gas stoves in other than a through the wall scenario, if a horizontal offset is needed, that horizontal offset must occur at least 24" above the stove? Thank you in advance.

 

[DAKSY]

All units are different. You will have to do more research. Every stove is tested with multiple venting scenarios & performance is evaluated with each. If the manual for the particular stove you want says 24” minimum, then that’s what you’ll have to install.

 

[bakingfool]

All units are different. You will have to do more research. Every stove is tested with multiple venting scenarios & performance is evaluated with each. If the manual for the particular stove you want says 24” minimum, then that’s what you’ll have to install.

Thank you for the reply. I was guessing this is the answer to the question I asked. I am having significant difficulty getting the answer for specific stoves from dealers. Perhaps they want me to buy a stove first, but also it may be a question that their installer needs to research himself and understandably may not want to invest the time. I need the info to design the house, and choose a stove that will be compatible. I will return to pursuing the answer from dealers - which has initially been a bit frustrating but my only option. I am looking at the Jotul 370 DV, Regency RC500E, and Enviro S50 all cylindrical models. The Jotul manual and dealer do specify a 24" requirement for a propane use, the other two manuals were not as clear.