Is it a bad idea to reuse a chimney for an over the range vent hood?
I now have a 90+ furnace and electric water heater.
So the old chimney is blank'd off.
The old chimney is round sheet metal surrounded by what looks to be concrete.
Its about 10' long, and about three feet to where the back of the range hood would be.
I would put in some type of damper to prevent backdraft.
The range hood would be 200-300 cfm.