The Required Heat Output For Your Room

Before purchasing any stove or fire you need to know what heat output you need to achieve a comfortable temperature in your room.  When your room temperature is 21℃ and the outside temperature is 0℃, you will need approximately 1kW of heat output for every cubic metre of space.


Measure the length, width and height of your room in metres.  Multiply the three figures together, divide by 14 and round up to the nearest whole number.

For example, if a room measures 7m long by 4m wide and has a height of 2.5m:

7 × 4 × 2.5 = 70 

This means the room has 70 cubic metres of space. 


70 ÷ 14 = 5

This means a stove with at least 5kW of heat output would be needed for the room.

However, factors such as the number of outside walls, the size of windows and whether they are double glazed, the age of the home etc, can all influence the heat requirement.

If maths is not your thing, you would like us to check your sums or have any other questions, please just contact us and we will be happy to help.  Or take a look at this quick calculator online.  At Fire Design Studio we offer free, no obligation surveys and would be happy to work all this out for you.