How do I calculate the size of radiator I require

[buddyinbeds]

I wish to add three radiators to new rooms. How to I calculate the size (BTU) of radiator required for each room size ?

 

[Biggles..]

width x length (in feet) x Y (Y=36 for new build and 37 for insulated cavity and 38 for open cavity).Shouldnt be far wrong using that.

 

[buddyinbeds]

Thanks for that

 

[hawthorns]

width x length (in feet) x Y (Y=36 for new build and 37 for insulated cavity and 38 for open cavity).Shouldnt be far wrong using that.

i have a room 16ftx10ft and 8ft high and i want to put a radiator in it. i was told to get a double one but what size do i need 3,4,5,6ft long

 

[gas4you]

Use a mears calculator. Industry standard and ridiculously quick to use