Fitters told me that I should run this at 74 degrees.
Which I thought far too high, as
1) it makes the radiators too hot to touch 2) basic thermodynamics suggest that a better temperature profile will result from having the radiators at the lower temperate for longer period than a higher temperature for a shorter period
I tried to explain this but was met with
"The recommended temperature is required for the condenser to have any effect"
and the completely bogus "the temperature of the water in the radiators is set by the TRVs not the boiler temp. I couldn't persuade the guy that he was taking bollox, he played the "I'm the experience heating engineer card and I know better than you" card. Twat
Anyhow, at my current house it is 55 and works perfectly well
what do you guys/galls do