First, select the type of room you're doing the calculation for:
We’ll need to determine the total area of the room. Please enter its dimensions in metres:
Next, we need to know the size and type of any windows in the room to calculate how much heat may be lost.
To work out how much heat may escape through the walls, we’ll need to know how many external walls the room has, and what type of walls they are.
Finally, please tell us what is above and below the room and then click ‘submit’ to receive your result.