In article , chris French
writes
There seems to be floating about among some people I know online the
idea that keeping the central heating on all the time is cheaper than
turning it off at night.

But in principle it seems rubbish, it must use more energy to keep
something hot, than to let it cool and then reheat.,
Of course you are right.

but a couple of
people had been hard to convince, esp. as a 'plumber told me it)
Arguing with idiots is seldom satisfying.
--
fred
BBC3, ITV2/3/4, channels going to the DOGs