Thank you all for your replies although some of them confuse me! It would cost far too much to run a gas supply to each flat and 2 of them are just too small to justify them having their own boiler, (Studio/bedsit with separate kitchen/diner and shower room), and at our ages we wouldn't live long enough to recoup our outlay:sad_smile:.
Buckley, this is not a shared house it is 4 separate units. The prospective tenants would be told of the times the CH would be on and if he was a night shift worker then he might think the flat was not suitable for him or he has the option of using, and paying for, electric heaters (which is the tenants only option at the moment) when the heating is off during the day.
Matt, the radiators will have thermostatic valves. I wouldn't expect them to use the electric fires instead of the CH when it is on. I was assuming that if I had a tamper proof thermostat in the entrance hall set at 21 degs. then if, for example, we had a warm few days, in April or October say, that the heating would switch off and the tenants wouldn't need to open their windows to let the heat out. Am I wrong in looking at this as being the same as in my own home (except for the fact that the tenants cannot interfere with my settings).
Mike, I don't know what a heat recovery system is so I shall Google it now.
Isn't there a landlord out there that is doing what I'm thinking of doing? Thank you again for your comment. Pat