I'm thinking of getting some under sink water heaters at work, I was going to fit a boiler but thinking that as we use hot water merely for hand washing, rinsing cups etc these could be more cost effective than having the boiler running while the hot water eventually materialises. (Opinions on that would be appreciated though, given the cost difference between gas/electric)
Then if going for the under sink units, would gut instinct lead one to get ones with or without a tank (thinking 10/15l)?
Cheers.