I installed a wood burning furnace in my basement, with an outside double-wall / air insulated steel Class A chimney. During high winds, I am getting smoke back into my house through the furnace loading door. I am convinced the wind is so strong it is pushing down the chimney.
If I keep the chimney temperature at 350 degrees+, I can reduce this problem. But when the wind gets to 30MPH+, it gets tougher to keep the smoke going the right way.
I bought a chimney cap that was supposed to eliminate this problem, by creating a venturi action when wind tried to blow down the stack; the problem was reduced, but is still a problem.
The chimney is at the rear / southwest of my home; the wind comes from the southwest and blows past the chimney and toward the roof.
The chimney does not go above the peak of the house, but the top of the chimney is at least 10 feet away from the roof.
No one has yet been able to guarantee a solution; one tells me this specialty cap would fix the problem, someone else says I may have a negative pressure issue in the house, someone else says I need to increase my chimney height.
Any ideas out there? Have you run across this problem? What was your solution?
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