Bit of background - have had 3 different plumbers visit in the past 5 months as tenants are saying house is too cold.
All plumbers have said boiler is fine.
5 months ago when our own hot water tank went, we even asked one plumber if it was worth swapping the boiler from our house (4 bed detached)
into the rental one (2 bed terraced) and he said, actually - the one in there is better.
All plumbers thought there was sludge in the system as raditors were cold at bottom/warm at top so I replaced all 7 raditors in the property last month, added thermostat valves and paid for a power flush too.
Tenants say is still costing them £100 a week in gas and they can't afford it.
They say they have no debt on the meter and nothing is wrong with it.
They also keep saying next door have a combi boiler and pay £30 a week so they want one too, but I can't spend that amount of money with no plumber saying I need to!
Any ideas?