In message , Peter Parry
wrote

The
pattern of occupation of both houses is similar but the heating costs
for mine are consistently 15-20% less than his.


But surely no meaningful conclusion can be drawn from a sample of 2. I
have friends that want their house heated to temperatures that I find
uncomfortable - their house temperature may be only a few degrees
higher.

I know of some people that have tuned on the heating for short periods
to 'take the chill off' in the last week. My heating is still off.

--
Alan