Published by Steph Ellis on 4th March 2023

Radiator size guide

Choosing to install new radiators is a direct way to improve the heating within your home however you may need help with choosing the right size.

Calculating the correct radiator size

A radiators heat output is calculated in British Thermal Units (BTU’s). When choosing the correct radiator, there are a few factors to consider, these are:

Room dimensions
Number of windows
Floors and walls
Number of radiators required (for bigger rooms, you may need more than one radiator)

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