Boiler setting.

[Des Jennings]

Set the boiler to maximum when ever you need to raise the house temperature quickly, then turn it down once it has got up to the comfort temperature. Experience will help you determine how much you can turn it down. The better more modern control systems will be able to do this automatically for you...

They know how high to set the boiler stat, in order to hit your set room temperature within a reasonable time, then ramp the boiler down so as not to over shoot.

Thanks.

 

[Ihavenojob]

What size is the boiler (18, 21, 24) ? Also, are the radiators the correct size . Older boilers ran at slightly higher temperatures , and would sometimes need larger radiators as a result of putting a condensing boiler in. Worked in many new build estates built at the turn of the century (God, that sounds like I'm ancient) and the rads were just about adequate, they were also fitted to microbore a lot, which may not help. Get an online calculator and see if the rads are too small.

 

[sxturbo]

Thanks for your help.


Thanks. I adjusted the boiler dial this morning to a new position ( see attached). The CH was switched on at 10.00 with the hall thermostat reading 18.5C . The radiators certainly got hot , eventually too hot to touch. The boiler switched off at 21.2 C at 13.00. So the the temp was raised by 2.7C in 3 hours, still nowhere near your suggested 30mins to an hour but better than when using lower boiler dial positions.

Hmm yeah that is still too long.

Did you say the small rads get hit quickly but the large rads take a lot longer to get hot?

 

[Des Jennings]

Hmm yeah that is still too long.

Did you say the small rads get hit quickly but the large rads take a lot longer to get hot?

That's right. There are 9 small rads and 6 larger rads and a 24 kw boiler. The boiler recently started a cycle again and got from 20.8C to 21.2C in 30 mins, much quicker than yesterday after adjusting the boiler dial, although still not on max.