How to Choose the Right Radiator and/or Towel Rail

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BTUs stands for 'British Thermal Units' and is a measurement of thermal energy. It is always worth remembering that there are several factors involved when it comes to calculating the output you require from your radiators in order to heat your room efficiently. 

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Use our Heat Output Calculator below to find your required heat output. Enter the required information and our calculator will provide a guide as to how many BTUs you will need in order to make sure your room is warm and cosy. 

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Once you've got your calculation you'll be able to shop with confidence:

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How to Calculate Heat Output to BTUs for Your Room

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Ultimately, employing the services of a plumber will yield the most accurate results. That being said, our calculator below will provide you with a good guide as to what BTUs will be required to ensure your room is heated properly, which also serves to optimise your heating efficiency.

Please note: this is a guide only and will show you the combined heat output of all radiators/towel rails required for your room. Larger rooms such as Living Rooms may require more than one radiator positioned evenly throughout the room. If this is the case, divide the required output between the number of radiators needed.

• A radiator with insufficient output may never raise the temperature of the room to that which is required. 

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• Outdoor temperatures, external walls, insulation, heated adjacent rooms (i.e. above, below and to the side) will all play a part.

• The boiler should be sufficient enough to supply all connected radiators to the sum of their maximum demand.

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Calculate Your Room's BTU Requirement