Many people often ask the question, how do I calculate the best size of heated towel warmers and/or radiators for the use within my bathroom?

This is frequenlty a thought of or asked question as the market has a extensive range, that come in so many different shapes, sizes and finishes and it can becomes very hard to choose and very confusing.

Heated towel rails will mostly come with a wattage rating, or a BTU rating (British Thermal Unit), sometimes both.

An easy method for working out your BTU requirements is to take the height of your room, multiply it by the width, then multiply it by the depth and multiply it by 5. For instance your room is 6ft x 8ft x 8.5ft so 6x8x8.5x5=2040. Your room requires a heated towel warmer that gives out a minimum of 2040 BTU or more.