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Calculation of resistances for an insulated wall
|Surface||Area (m2)||U Value (W/m2K)||Thermal Loss (w/K)|
|Internal Walls||No Loss||-||-|
|Total for building fabric||207.3|
Assuming a Room Temperature is required at 20C and an outside temperature of 0C
The heat loss for the fabric = 207.3 X3=20 = 4146 W
Air Infiltration is assumed at one air change per hour.
Heat loss = Volume X specific heat X difference in Temperature
= 520m3 X 0.33 X 20 = 3432 W
Total Heat Loss = 4146 +3432 = 7578 W
Would suggest 6 radiators having at least 1263 W output.
From Manufacturers Catalogue 600mm high X 1000mm long double panel radiator gives 1336 W this would do the job