They don't have to be instant either: I've seen 120V plugin models that have a small tank. No idea what's better, but you don't need a 240V hookup in the bathro

They don't have to be instant either: I've seen 120V plugin models that have a small tank. No idea what's better, but you don't need a 240V hookup in the bathroom to have a "while the pipes heat up" heat source.