radiator size 8m2 18m3

[handsomejackuk]

rough idea please cold bedroom i have 900 x 600 single radiator 1m2 of window area stone built cottage 8.2m2 floor area 18m3 volume. 3 outside walls, according to the radiator size i have its about 923w and i calculate 984w, looking to replace with possibly a double does this sound as if it will be better heat... 1609w....

 

[TeaTime]

Is the window double glazed? Plastic, metal, wood?
Is your room north facing?
Whats ther floor above? Insulated? How much?
Solid brick wall thickness?

 

[handsomejackuk]

Is the window double glazed? Plastic, metal, wood?
Is your room north facing?
Whats ther floor above? Insulated? How much?
Solid brick wall thickness?

double glazed plastic 10mm air gap i beleive
floor above is attic ceiling with 50mm insulation
stone built property solid 24inch thick
room is end of a terrace with two walls facing east and west, and the big longest wall 4m facing south, window is on the east side facing a high mountain gets very little sunlight in winter. floor below is living room heated space.