If you’ve chosen a style and size, it’s important to know what the BTU (British Thermal Unit) output is for your home. Dont worry, it’s not difficul to workout when you use our BTU calculator! This metric works out how much heat is required to effectively heat and maintain the temperature in a room. If you choose a radiator with a lower output than the BTU of your room, you run the risk of sky-high energy bills. Use our simple calculator to find your BTU to help you shop for the correct towel rail. Contact us for hep if you need additional advice.