I'm looking at the possibilities of replacing my water heater. Currently we have an electric, 2 element, 50 gallon tank heater that is 32 years old and almost ready to go. The water can sometimes come out milky colored, rust colored, occasionally with rust flakes stopping up filters, etc. And runs about $850 a year in electricity. It still pumps out exceptionally hot water, but we're definitely paying for it.
So currently it's electric with tank hookups; we'd have to reroute the water pipes a little over to the wall and we'd also have to add a gas connection (the main runs directly overtop of where the unit would be. The main gas line comes in nearby at 1" and hits a T above the water heater where a 3/4" line runs to the furnace and a 1/2" line goes to our gas range. I've seen that pressure and such would have to be checked by a professional, but does this sound like it'd leave room for other WH?
Otherwise from what I can see, this is all fine and will work with what we have I believe. The last condition though, is venting this new gas exhaust. We have a vent line currently coming off of our gas furnace, which is directly beside the water heater, leading overtop of the water heater, and into a chimney. The furnace is the only thing that exhausts through this flue. Since the vent runs directly over the current location of the water heater, I'm wondering if we're able to connect straight into it with a T to vent the new water heater. I've seen many resources on this, but they all seem to give a different answer. One says to break in a new hole specifically for the WH, another says to connect them together, another says that you can't use the same chimney for both appliances and to create a new vent line to the nearest exterior wall, etc.
We could possibly take any of these routes and be able to work it in, but I'm hoping for the easiest acceptable solution and why it vs the others.
Also, as you might can see by the picture, the chimney appears to have had 3 other holes in the past that have been filled with concrete.. Or for some reason at least there are wads of concrete on it. One of these could possibly be used.
Also, here is a quick floor layout to show where everything is in relation to each other: