How to specify a Radiator 

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1. Calculate the heat requirement of the room in Watts. Consult with a heating engineer for the exact
   requirement but as a rough guide for initial sizing and pricing allow 50 Watts per cubic metre of the room.
   To convert the Watts into btu/hr multiply 3.412.

2. Choose the location of the radiator and work within any restrictions i.e height, if the radiator is being fitted
   under a window.

3. Check the list of sizes to see if we stock a suitable radiator. If working within a limited length remember
   to allow space for the radiator valves.