Hi, we installed one a good few years ago in an old house we renovated and it was one of the best heating systems we ever had the house originally had a normal boiler, the downside is it is running all the time if you want to wash up after dinner( we are averse to dishwashers) or anything else it comes on when you turn the tap on, it won't fill a bath in any hurry either, the hot press is a handy thing so we ran a copper pipe along the wall and put in one anyway, on the plus fantastic heat output, on the minus the fact that its running all the time, hope it helps