Our house has a flat roof, in Toronto, Canada (cold climate). Total area of the first and second floor together is 1300 sf.
The gas furnace and gas water heater are in the middle of the basement and the present chimney runs through the middle of the living room and the bricks around it are deteriorated.
Although the previous owners had a new liner installed, it is single wall liner.
I would like to move this chimney to the outside of the house and remove the old one from the middle of the living room.
My question is, is stainless steel double walled 6" chimney that rises above the roof by 2' be sufficient?