DO NOT GET AN ELECTRIC TANKLESS!!!! If you want tankless, you have to go gas. The electric one’s take too long to get the water hot and sometimes cannot keep up with demand.
Three of my many disciplines are electrical engineer, electrical contractor, general contractor.
Do the gas ones work? What kind of flow do they give?
See my post below. We had a gas tankless and it would shut itself off when the water pressure got too low. Gas is not the answer, either.
And when the power goes out, no hot water on an electric tankless.
Depends on the load. Never had a problem with hot water delivery. The temp runs about 130deg. All electric.
Not to mention a new flue to handle all that wasted heat going up through the attic.