I am in the process of installing a 80,000BTU Mr. Heater garage heater in my shop. The manual calls for a 4" vent, either B-1 or single wall, horizontal or vertical. I have an existing 8" metal vent that was used with a wood burning stove that has been removed. I am trying to figure out someway to reuse the existing chimney without having to put a new hole in the roof or the wall.
I have been scouring the internet but so far have been unable to come up with a simple, legal way to reuse the existing chimney. It seems I could just run the 4" up through the 8" pipe but I need some way to secure the 4".
My other option is to put a hole through the wall and horizontally vent it. Clearances are tight since this is a low ceiling but I think it can be done. Would just prefer to use that existing hole if possible.
Any ideas?
J
I have been scouring the internet but so far have been unable to come up with a simple, legal way to reuse the existing chimney. It seems I could just run the 4" up through the 8" pipe but I need some way to secure the 4".
My other option is to put a hole through the wall and horizontally vent it. Clearances are tight since this is a low ceiling but I think it can be done. Would just prefer to use that existing hole if possible.
Any ideas?
J