:sigh: the omnipotence of STW has been sorely challenged
As far as I understand it you can calculate the heat requirement of a room by working out the heat loss using the u-value or thermal transmittance of the materials in the wall floor etc
So if you know the size of the barrier and the amount of heat it loses per sq metre you can work out the total heat loss.
So I have 24m2 of windows, the u-value of these is 1.7, so 24*1.7= 40.8
27m2 of walls, u-value of these is 0.3 (probably less but not more) 27*0.3=8.1
34m2 of roof u value is 0.25 (again probably less) 34*0.25=8.5
60m2 of floor u value 0.25 = 15
Add them all up I get 72.4, bung on 25% for ventilation = 90.5
Then I need to multiply this by the probable temperature gradient so if it’s -5° outside and I want it to be 21° inside that’s a difference of 26.
So 90.5 * 26 = 2353W (is that watts or what, it’s something)
Apologies, I’m not a maths head, typical B at o-level type bod which is why I need someone to critique these calcs.
Looking to get trench radiators (f’n expensive) and plinth heaters