We have a vented gas hot water tank that is currently using the chimney as a vent outlet. We want to avoid the cost of a direct vent unit, so we were wondering if there's a way of getting rid of the chimney (we're getting a new roof so now is the cost effective time to remove it) to save on heating bills (we live in an extremely cold area).
Is there a way to run a smaller vent up JUST for the hot water tank? I realize we need to run it UP so the gases accelerate as they go up, but how far up? I'm asking, wondering if we need to run it out the attic or if we can run it up and put an elbow in the vent higher up, say on the second storey and run it out the side of the house. We have a high efficiency furnace so that isn't vented out the chimney, ONLY the hot water tank uses the chimney currently.
The chimney currently is costing us a lot of money in heat loss, but we aren't keeping the house for more than a few years so it's not worth it for us to install a direct vented unit.
Sorry for the ramble, been gutting part of the house all day so I'm tired.
Dave