Our Kilowatt Calculator is designed to give you an estimation of the maximum heat output in kW needed for any room. You should note that if considering installing a central heating stove, then this calculation only applies to the 'output to room' figure for each boiler stove.
You should be aware that you may need to adjust the the heat output upwards if the room has stairs leading off it, is badly insulated, or has lots of windows/doors.