Dimension the wood stove correctly - you should make these considerations

Stoves are trendy. However, in the performance of the furnace there is often uncertainty. In this article you will find out which heating output makes sense in which circumstances. Read in this article how to find the right wood stove for yourself.

Determine heat output

The heat output of wood-burning stoves is usually given in kW (kilowatts). The specification of the stove manufacturer is quite important - purely from the view or size of the oven, one can guess quickly.

For example, simple, old bar stoves have a heat output of almost 10 kW, despite a very small firebox. In contrast, modern wood-burning stoves from the DIY store in most cases only make up a third.

It is important to note, however, that these values ​​are approximate averages only. They are only reached if the oven is operated correctly.

Which heating power do I need?

This basically depends on the use for which you determine the oven:

  • as full heating for one area or even for a (smaller) house
  • as additional heating with reduced heating power of the full heating
  • as a chance heating, especially because of the coziness in the room

Especially in the last case you should choose the heating output as low as possible. Overheated rooms are anything but cozy, and having to open the windows to get rid of the excess heat does not make sense.

Furthermore, the heating requirement also depends on the size of the room / house and on the construction.

Guide values ​​for the heating requirements of different buildings

Old buildings and especially old houses, in which no insulation is present, have a very high heating demand. On average, it is about 0.15 - 0.2 kW per square meter. If you want to use a wood stove as a full heater here, you must make special considerations.

Older, not particularly effectively renovated houses have a heating requirement of approximately 0.08 kW per square meter. For slightly better insulated buildings from the nineties onwards, they have a heating demand of around 0.06 kW per square meter as a guideline. For fully insulated, modern buildings built over the past 10 years, you can expect to get around 0.045 kW per square meter.

These are only rough guideline values ​​for the full heating. To compensate for unavoidable fluctuations, you should multiply the result by 1.5. With this you are on the safe side regarding the heating power.

additional heating

With additional heaters, it always depends on what the standard heating can do. As a rule, in a reasonably well-insulated building, you only need minimal heat output to increase the room temperature by a few degrees.


For tiled stoves you have to calculate something different. Here, the heat of the oven is gradually radiated, often for up to one and a half days. The correct dimensioning of a tiled stove is therefore definitely a matter for a specialist.

Video Board: How to Determine What Type of Firewood Is Best For Your Woodburning Needs?