Well it is a big house on three floors so I guess they thought they needed a big one!
I have also noticed that despite the heating being turned off most of the radiators are hot.
Hi! I have just moved into a new house which has a Potterton 100e installed I am told 4 years ago but not serviced.
The unit keeps firing up every 20 or so seconds and then shuts down - this goes on whenever the CH or HW are on - doesn't matter which.
We have plenty of hot water and the CH...