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I'm installing new larger gas lines. I recently had an estimate for moving the A/C & furnace moved into the attic and they went over all the code requirements with me. First, the Heater and Water Heater are required to have dedicated gas lines, meaning they can't be T'd off the main line. The only "T" that is allowed is at the gas meter. The tankless also requires a larger line which I think was 3/4" or 1" (don't remember now). That is because even though the tankless will use less gas overall, it will use high volume when in use.
Unfortunately, my estimate from the A/C company was ridiculous so I am using the estimate to get some prep work done myself. The a/c company wanted $27k to install a new unit in my attic and that was after I supply the platform, gas lines, and ductwork. I'm dumb but not stupid.
At the time I had the estimate for the A/C move, I was planning on relocating the water heater to the attic as well.
Right now, I'm just in the prep phase and trying to save some money by building the A/C platform in the attic and running the gas lines. (Don't worry, I am going to have my licensed neighbor help me and pressure test the lines).
My primary question for today was only to find out if it is practical to have the water heater in a closet with food, etc.. Google has also been a big help.
Thanks all.
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