. Because of this my house is not warm in a few minutes, usually anything from a few hours to a few days to get it something like decent and keep it that way.
.........
. One big downside of this forum is the average age of members is beyond retirement age so anything modern is instantly condemned.
I would suggest getting your whole heating system a bit more modern and up to date if its taking
hours our
days to get warm.....
(probably need better insulation to?)
Multiple zones and thermostatic radiator valves have been an easy option for years and years with no need for a smart phone...
For ages now we have had 4 zone system...
1) Downstairs 2) Upsatirs 3) Water 4) Towel rads x3
Each with own thermostat + thermostatic valves on radiators
Every zone programmed individually..
If starting from cold with a decent boiler and pump soon its brings zone up to heat...
10 .. 15min max (not hours or days)
{just to add this is an old property where original external walls do NOT have cavities than could have been insulated. but the two extensions do have cavity walls though}
Also been gradually working round the whole house increasing insulation in loft void and floors between downstairs and upstairs..
Decent zoning and insulation far more important and cost effective than trying to heat a whole house while you are not there via a single zone.
Downside of the internet is that some people think without a hi-tec app any other options are irrelevant.
p.s.
You may be a forum member beyond retirement age....
but I am not.
:Salute Guinness