Room Size and the Size of a Bioethanol Fireplace

It is not the use of oxygen that diminishes the air quality in the room, but rather the increased production of CO2 from the open fire. Carbon dioxide (CO2) is a molecule that is naturally in the air, but it is also created by plants, animals, humans and - of course - from all combustions such as bioethanol.

To keep the high air quality in the room, it is a good idea to think about the room size and which fireplace there will fit into this room. If you choose an over-sized bio fireplace for a small room you will find that the quality of the air drops, which can cause headaches and discomfort.

Built-in bioethanol fireplace

Burning of Bioethanol

To find out which fireplace there will fit into your room, you can look at how much oxygen a bio fireplace uses and how much CO2 a bio fireplace makes.

Two people deduces ca. 75 g CO2 pr. hour.

A bio fireplace, which burns 0,5 litre bioethanol on one hour deduces 740 g CO2.

The air contains an average of 21% oxygen. This means that in a room of 40 m² with a ceiling height of 2.5 meters (100 m3) there is 27 kg of oxygen.

Two adults uses around 55 g oxygen pr. hour.

A bio fireplace which burns 0.5 litre bioethanol on one hour uses 800 g oxygen.

Therefore it is recommended that you in a room of approx 80 m3 are using a bio fireplace with a consumption of 0.5 litre bioethanol or less pr. hour.

In addition to creating CO2, only heat and slightly evaporated water are created during the burning of bioethanol.

Little boy in front of a bioethanol fireplace

Room Size and Bioethanol Burner

In the graph, to the right, you can see what is recommended as the minimum room size for different burners. Calculated based on bioethanol consumption of bioethanol pr. hour.

In the graph we have added two of our most popular bioethanol burners:

  • 1.5 liter Deluxe burner
  • 5.0 liter Superior burner

The two burners use approx 0.375 and 0.714 liters of bioethanol pr. hour and requires a space of approx 60 m3 and 114 m3. Both burners are adjustable and if the room size is just below the recommended, you can choose to use the fireplace with a downgraded flame.

To calculate the volume of your space, use the following form and multiply spaces: Length x Width x Height = Volume (m3)

Recommended room size for bio fireplaces

X indicates the consumption of bioethanol pr. hour

Y indicates the room size in cubic meters

Ventilation of the Room

At last, the replacement of air helps to compensate for both CO2 emissions and oxygen consumption.

To keep the indoor climate in the best possible way, that is, the air quality in the room as high as possible during the operation of the bio fireplace, it may be a good idea to ventilate the room, either by opening doors to other rooms or by opening a window.

Ventilation for bio fireplaces