After 21 years our 40 gallon tank water heater sprung a leak. I looked at tankless as a replacement. I chose another old fashioned tank type water heater. Other than springing a leak, there is little to go wrong. No motherboards, no timers, the only thing electrical is the igniter (gas heater) which we would need for the tankless anyway. At the cost of gas here, with a two person household, the energy savings with a tankless would not likely recover the cost in either my or the water heater’s lifetime. The device is located in the garage, not more than six inches from the master bathroom shower head. Hot water can not be much more instantaneous than that.
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