Heat requirement calculator

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What size radiator?

Use Castrads' heat requirement calculator to work out exactly how big your cast iron radiator, modern radiator or towel radiator should be.

Room height in metres
Room width in metres
Room length in metres
Total area of all windows in room in metres2
Type of room	Please Select... Living Room Bedroom Hallway or Kitchen Bathroom
What is below the room?	Please Select... Heated room Soil under wooden floor Soil under solid concrete floor Air under suspended concrete floor
What is above the room?	Please Select... Heated room A pitched uninsulated roof Pitched roof insulated 50mm Pitched roof insulated 100mm Flat roof uninsulated Flat roof insulated
What material are the external walls?	Please Select... Brick Cavity Insulated Brick Cavity 105mm Solid Brick 220mm Solid Brick Wood frame
What sort of windows do you have?	Please Select... Wood/Plastic double glazed Metal double glazed Metal Single glazed Wood Single glazed
How many walls are exposed to the exterior?	Please Select... One Two Three

Watts Required:
BTU's Required:

Castrads Modern Radiators is a subsidiary company of The Castrads Group,
providing quality heating solutions since 2003.
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