I hadn't had mine on, but had a sore throat on Sunday & felt a bit miserable, so Monday I fixed the thermostat display (had been meaning to do it for months, but putting it off) and had it on for about an hour. Yesterday I felt dreadful so I put it on from about 11 to about 10pm. My house is bijou
( or like a toddlers shoe box) so it cost under £4 (according to smart meter) I had intended to leave it on 18, but it was still very cold, so I put it up to 21° and really warmed the whole place up properly.
it went off at 10pm last night and had stayed at about 16° all day, which is fine for me right now. Plus it's a sunny afternoon here, which psychologically helps!
I have to go out about 4:30 for a couple of hours, but I expect ill
put it on when I get back & it'll stay on until about 10pm and by the time it cooks down it'll be time for bed.
it won't go on a timer for a couple of weeks yet as (for me) it's not necessary & my home/out schedule is all over the place and my system isn't yet app controlled.
these threads make me so envious if those with fireplaces!!! (And even log burners!!!)
[it's my 'owned' (quite a lot by the bank🤣 ) house & i'd put one in if I could, but I cant (local restrictions) <sob>