wrote in message
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You might be interested in buying a tankless water heater.Look on the
web for,
How do Tankless Water Heaters Work?



The OP already said the cost is prohibitive. Tankless water heaters require
a larger gas line and much larger flue vent than conventional tanks because
the burner is usually around 150K BTU rather than 30-40K BTUof a
conventional tank. I plan to install one in my place because I have a large
flue that originally served a gas furnace but I replaced that with a
condensing furnace that uses a PVC flue, but had I needed to install a new
vent for a tankless heater it would be too complex and expensive to bother.