What temperature does each setting on a TVR give?

[starfish4]

We moved into a new house in the summer and have had heating engineer to service boiler and generally check system over. He said if a TVR is setting to 4, it heat to about 25c in that room, so I was just wondering what settings 2 and 3 would heat up to (providing the main thermostat hasn't cut out). I know we can change them, but just interested.

Nonsense. It doesn't work like that, and 25C is far too hot in a house. Your bills would be enormous.

this guy wasn't an engineer (they are the ones who design things) and it doesn't sound like he was a technician either. Check that he holds the appropriate registration - if your boiler runs on gas, is he on the gas safe register?

There is no exact match between the TRV setting and room temperature - far too many variables. Look at your insulation, make sure your radiators are bled and balanced, and play with the TRV settings until they are right for you. Also in the summer when the heating is off, all the TRVs should be set to maximum.

Thanks for your reply. I think he meant that if we set the radiators on 4, they would heat up to 25c if we wanted (which we don't). He did suggest we had the radiators on 2 upstairs as he felt the radiators were almost too large for the rooms and felt with heat rising they wouldn't need to be higher. I suppose time will tell - luckily it's still too warm for us to put heating on

He is gas safe registered and even an accredited heating engineer/plumber for the make of boiler we have - thought we done the right thing in choosing him in an area we don't know.

to be charitable, being gas-safe does not mean he can explain things; he may have tried to dumb things down too far (Not suggesting you need it!) which of course never works.

but he is still only an engineer if he designs things. The correct term for what he does is 'technician'. Still a perfectly respectable job, but he's not an engineer.

(This is why there is a shortage of engineers as everyone thinks it means the chap who fixes the boiler, and there are plenty of those)