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