togin wrote:My coal supplier says no, that it is too dangerous, chance of explosion.
It may be, but I'd like to have it explained to me. I know nothing about natural gas. The law does say no two things in one chimney, but for the life of me, other than a wood stove and something else, and as long as they both don't fire at the same time, I don't know why it wouldn't be safe. It might not be as efficient, but I'd like to understand why it's dangerous. Burning wood and having another appliance in the same flu allows uncontrolled air into the chimney if there's a chimney fire. With anything other than wood you will not creosote and will not have a chimney fire, so where's the danger?
I'd make it so it's a 10 minute project to switch from one to the other. Swap pipes, flip a few switches, go on vacation.