Autumn and winter is the peak wood burning season, and before you get started, you’ll want to know which type of wood burns best, how to store it, and the easiest way of lighting your log burner or fireplace.
Not all wood is good firewood! Some species are high density and give off more heat than others when burnt. A beech log, for example, will give you 50% more heat than a spruce log of the same size. Basically, the weight of seasoned firewood tells you how much heat it generates even if the volume of the firewood is the same. In other words: if the weight is the same, the heat output will also be the same, regardless of which species you go for.
According to the Norwegian Institute of Bioeconomy Research (NIBIO), holly is the most dense and burns the best, followed by yew, beech, oak, ash and rowan. At the other end of the scale we have linden, goat willow, aspen and spruce. View the complete list here.
It depends on where you are! Birch is a big favourite in the forested Nordic countries of Norway, Sweden and Finland. This widely available wood is high density and generates a lot of heat.
In the UK and the US, oak is the most popular firewood, while Germany favours beech. It all comes down to which species are most readily available in your location.
The plain and simple answer to this is YES!
If you have an outdated, non-clean-burning log burner or fireplace, only 50% of your firewood will give you heat. Our fireplaces and log burners are clean-burning and feature combustion technology that has an efficiency rating of more than 80% with correct burning. In other words; you get maximum heat from every single log you place in your fire.
Where a traditional, non-clean burn fireplace only manages to utilise 50% of the wood for heat, up to 80% is utilised in a clean burn fireplace
Energismart*, Friends of the Earth Norway
*Energismart is a household energy-efficiency advisory portal from Friends of the Earth Norway under the European TopTen network.
Green, unseasoned wood should ideally be stored outdoors under a roof or topped by a tarpaulin to protect it from rain and snow. Unseasoned firewood contains a lot of moisture, which needs to evaporate before it can be used as fuel. Try to store your firewood facing south, so it gets maximum sun and heat and dries reliably.
Stack your firewood on a pallet or other raised structure to prevent ground contact. Make sure that your firewood is well aerated for drying, including underneath it, to prevent exposure to mildew or rot. Leave air gaps between your logs – the experts say that the space between logs should be big enough to let a mouse squeeze between them!
Storing unseasoned firewood indoors is not a good idea, as it may harbour both mould and vermin, and creates an unhealthy indoor climate.
A wood stack gives you no grief. It won’t lose value on the stock market. It doesn’t rust. It won’t file for divorce. It just stays put, doing one single thing – waiting for winter.
Lars Mytting, author of the book "Hel ved" (Solid wood)
According to the Norwegian standard for firewood, once the moisture content of your logs is below 20% they are sufficiently seasoned (dry) for use in your log burner. By then you can also safely store the logs indoors in a well-ventilated recess. But if the moisture content is any higher than this, any attempt to burn it will be unwise: combustion and heat output will be poor and the chances of soot formation on the log burner glass increase drastically.
There are various easy ways of checking if your firewood is seasoned enough to burn. Here are three:
Listen to it:
This is the easiest method because it requires no preparation or accessories. Dangle a piece of firewood in each hand, then knock the lower ends together. Dry wood will ‘bonk’ or ring and wood with high moisture will ‘thud’.
Soap and blow it:
Smear some washing-up liquid and water over the radial end of a piece of firewood and blow air into it from the opposite end. If soap bubbles up, the wood is dry. This is because fibres in the wood act like “air ducts” and as the wood dries, the moisture evaporates through the radial ends.
Moisture meter:
You can do a more precise, technical test using a moisture meter. These are typically available to buy from DIY or hardware stores.
Be careful about what you place in your log burner. The manual for your appliance also tells you what is safe to burn.
Do not use your fireplace as an incinerator for refuse like cardboard, paper, gift wrap, building materials, etc. These can release harmful pollutants into the air and damage your fireplace or log burner, as the temperature can get too high. Worse still, burning these may deposit a flammable coating on your chimney liner and could cause a chimney fire.
Never burn painted or pressure-impregnated wood or chlorinated plastic (PVC). These give off extremely toxic fumes. Do not burn driftwood. This contains salt which converts into chlorine by combustion. If you do want to use driftwood, you will need to leave it out in the open, exposed to the elements, for at least two years.
Liquid liquids such as lighter fluid, petrol, bio-oil or kerosene should not enter the fireplace either. These are highly flammable and are also not good for the environment.
The usual length from Norwegian firewood producers is 30 cm today, while some stoves require wood logs of a maximum of 20 cm. Both on our product pages and in the manual for each individual product you will find the maximum recommended length of wood, we recommend that you use lengths that are slightly below what is listed to get good traction.
According to the Norwegian standard, the cube diameter must be between 8 and 15 cm. And we recommend that the kindling wood is about 2-4 cm thick.
Logs kept outdoors or in a cold storage space should be brought indoors 24 hours before use to bring them up to room temperature. Then chop kindling sticks so they measure approx. 4 cm in diameter. This makes lighting the fire easier and results in faster chimney draughting.
Before lighting your fire, open all the draught vents; some log burners have only one, while others have two.
The easiest fire-lighting technique is as follows:
We call it the top-down technique:
If the air flow is normal you can now shut the door and the fire will take care of itself.
In our range of contemporary fireplaces and log burners, you are guaranteed to find one to suit your needs, and to give you real log fire heat and homeliness for many years to come. Contact your nearest dealer for help in realising your log fire dreams.
