Calculate Before your Buy!
Our radiator calculator allows a quick and easy method to determine the radiator size/sizes needed in a normal domestic environment. There are many different methods to calculate this requirement; ours is one born out of experience but may not suit everyone. No warranty is offered or implied as to the accuracy of this calculator, and it should be considered as a guide only. Please select from the options below as closely as possible to your room conditions; we have included as many variables as possible, plus an option to allow your preferred heating 'comfort type'.
Radiator Chart
Before installing a radiator, you should always keep in mind the size of a radiator that needs to be installed. This will ensure the boiler is not overloaded and can save a lot of money on gas and electric bills. Heating system should be sized accordingly to the space to be heated and ensure the temperature is pleasant. Radiator efficiency is always calculated in BTU or British thermal units. It is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. It is clear that larger rooms will require more heat to remain comfortable. To make a selection of the ideal radiator easier, we have provided a Chart alongside which shows how to calculate your room size and which radiator would be the correct fit.
Resources:
Read our Buying Guide on Central Heating Radiators