On demand electric water heater.

[Squanto]

I'm considering adding a point of use water heater under the kitchen sink. The on demand propane heater is some distance away so the sink is full before the hot water arrives. It's fine for the shower which is right above it. I'd also rather use electric if hooked to shore power.

Is this a bad idea for some reason?

[notanlines]

We have two point of use 4 gallon water heaters in our stick and brick, kitchen and master bath. Well worth the $200 each and very little trouble to install!

[NH_Bulldog]

The Fire Investigator side of me is compelled to advise you to engage a licensed electrician for the task.

Now that I have said that, yes it can be done. You seem to know the difference between “on demand” and “point of use” and that’s half the battle. The other consideration aside from the electrical is the plumbing. You will need to cap the existing hot water supply (red pex) to the kitchen sink, and only feed the point of use water heater with the cold water supply (blue pex) on the input side and then the output can be connected to the sink faucet as usual. If it were me, I would use an inline shutoff valve on the hot water side in the (rare) event that you find yourself without shore power, so you could still use the demand water heater for hot water if needed.

On the electrical side you will likely need a 20 amp dedicated circuit to the point of use water heater. This will require adding a breaker and wiring from the power center to the point of use water heater under the sink

[chuckster57]

Originally Posted by NH_Bulldog

The Fire Investigator side of me is compelled to advise you to engage a licensed electrician for the task.

Now that I have said that, yes it can be done. You seem to know the difference between “on demand” and “point of use” and that’s half the battle. The other consideration aside from the electrical is the plumbing. You will need to cap the existing hot water supply (red pex) to the kitchen sink, and only feed the point of use water heater with the cold water supply (blue pex) on the input side and then the output can be connected to the sink faucet as usual. If it were me, I would use an inline shutoff valve on the hot water side in the (rare) event that you find yourself without shore power, so you could still use the demand water heater for hot water if needed.

On the electrical side you will likely need a 20 amp dedicated circuit to the point of use water heater. This will require adding a breaker and wiring from the power center to the point of use water heater under the sink

If he has the counter space, can’t he just plumb in the cold in, then put a faucet in the counter and plumb the hot out to that faucet?

[notanlines]

Ours are 115volts, 12 amps. Both have the original hot water supply line going to the ‘in’ side and the ‘out’ line leading to the hot side of the faucet. An on-demand water heater in your unit might require a little thought.