If it were me, I’d look into one of those on-demand, tankless, endless hot water heaters.
My new Florida home has a natural gas-fired Rheem unit mounted on the outside. We love it.
Tankless is a great way to go.
Tankless is a great way to go.
The problem is I would still need a sealed combustion air unit so I can close off the fresh air connection to the attic. I see that sealed combustion on-demand tankless water heaters are made, but they are really expensive. Plus I’d probably have to increase my gas pipe size which is a big added expense.