this post was submitted on 21 Nov 2025
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Good lord, well that puts that into perspective, thanks.
Yeah, a tankless pulls down power like an EV, and since conversion to heat is 100% efficient (loss in the pipes on the way to your shower notwithstanding) you actually need that power to heat up the water at the speed a tankless sends it through. That's why the gas ones work better, hydrocarbons store a shitload of energy.
Yeah, although electric heat is 100% efficient it takes a lot of energy to heat water quickly. You're better off going with gas for hot water on demand. I imagine the unit price is more, but the install price will probably be lower.