Add to Shopping List
Please select your preferred colour.
You must Login/Register to save an item to your shopping list.
Login / Register CloseHeat Output Calculator
Calculate your room's BTU requirement
Enter your room details below, along with a name, and save it to your Wish List to keep it for easy reference.
Please note, this is a guide only. A radiator with insufficient output may never raise the temperature to that required. Outdoor temperatures, external walls, insulation, heated adjacent rooms (i.e. above, below and to the side) all play a part.
The boiler should be sufficient to supply all connected radiators to the sum of their maximum demand.
Larger rooms such as Living Rooms may require more than one radiator positioned evenly throughout the room. If this is the case, divide the required output between the number of radiators needed.
My Required BTUs
It is important to know how many BTU’s you require to heat each of your rooms.
You can use our Heat Output Calculator to work this out, and save each room’s requirements.