Tankless water heater or NO?

[Walding1989]

Not realistic for a family of 4 on 3-4 drastically different schedules.

is the family of 4 up all night long?

[bboswell]

is the family of 4 up all night long?

Last one is usually 12;00-12:30 & first up is 4:15 so pretty short window

[Mike D]

First, cost of fuel/cost to operate is a different issue from efficiency.
And your propane water heater may be cheap to run, but it’s nowhere near as efficient as any electric, tank or not.
Second, you pay for KW-h, not KW, so there’s a factor of how long the thing runs that you’re ignoring. I could draw 120 A for an hour a day and still be using less energy than a 30 A appliance that runs six.

I may not have said it in the post you quoted but I did somewhere in another post how kWhr is achieved and that you are billed on that.


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[Greenheadless]

Couple of interesting facts from Consumer Reports:
Payback period for the investment in tankless:
Gas - 22-27 years
Electric - 12-20 years

Falls on its face from an operating cost/ROI perspective. Good luck getting 27 years out of a tankless water heater to recoup your “investment .”

Annual Energy Consumption Cost
Tankless
Gas - $195
Electric - $580

Tank
Gas - $245
Electric- $535

Not including maintenance.

“it’s worth noting that while gas water heaters are less expensive to operate, it’s due to the lower cost of natural gas and not because they’re necessarily more efficient. “Electric models actually run more efficiently," he says, "but the higher cost of electricity makes them more costly to operate.”

Want it all? Get an electric heat pump.

That is about as flawed as you can get when doing a true ROI calculation.

[Greenheadless]

We followed the Richmond installation manual.

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Interesting.