Hi guys,
I am also having a problem with back burn. I'm running an 8" system with a cast core and heat riser built off specs from this you tube.
I have about 33 feet of horizontal pipe with 3 90s in the system. with a 90 at the end then 4 ft of vertical pipe going out side from there.
Cob is mainly dry although the bench isn't done. As this is my first one I wanted to work out any kinks before closing it in with the bench.
I think the problem I have is that my pipe is going out on the windward side of the house. The system seems to run fine with no wind. If I get the slightest amount of wind coming by it will smoke back and blow the fire out. I have to exit on the windward side due to the fact, that's the side where the living area is.
My building is 30x40 cordwood masonry with a loft and a very open floor plan. The only interior walls are for the 14x6 bathroom/ laundry room. I hoping this system will heat the whole building.
My question is: I have a very tall ceiling, its 25' vaulted. Is that going to be too tall for the system to vent it out the roof? That's a lot of pipe to buy, Will that fix my problem?
Thanks Chris