On 12/01/2019 13:46, Dave Plowman (News) wrote:
In article ,
tim... wrote:


"Dave Plowman (News)" wrote in message
...
In article ,
tim... wrote:
Anyhow, at my current house it is 55 and works perfectly well

You must have rather oversized rads?

Nope

they are tiny

The physical size depends on the demand in that area.

they are on all day

The house is well insulated


Why do you think that wouldn't work?

Anything can work. But there is an ideal figure for rad temp for best
efficiency.

Best efficiency as far as the radiator is concerned is as hot as
practical - the higher the deltaT between radiator and the room air then
the more it radiates.
If you have the heating on 24/7 then yes you can get away with low rad.
temperatures, but for fastest response where the heating is timed then
hotter is better.
If you have intelligent thermostats like Hive or Nest then they will
learn the thermal characteristics of the monitored room and minimise
temperature overshoot by shutting down the boiler before the set
temperature is reached.