How do you calculate the correct size of radiator for each room?
Getting the right size radiator for your room will save money and also help you keep an even temperature in your home. The rule of thumb seems to be to install radiators that are just a bit more powerful than your calculation so that when you install the valves you can turn the heat down – under powered radiators only means you will have the valves open full but the room will never be warm enough.
The number you need to calculate is the BTU. British Thermal Unit.
This is a calculation of how much heat you need to heat 1 pound of water by 1 degree farenheight. There are a few explanations of this, just check out wikipedia to start, but really all you need to know is calculate the BTU number using a calculator like the one below and that’s the number you quote when you order your radiators.
Radiator Size Calculator
Grab your tape measure and start filling in the form for an easy calculation
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