Sawdust Briquettes: Benefits, Burn Time, How to Use (Updated Oct 2026)
Looking for a convenient, cleaner-burning, and more energy-efficient alternative to traditional firewood? Then wood briquettes could just be the right solution for you. Made from leftover sawmill sawdust, briquettes are dried to very low moisture levels and compressed to a very high density. This allows them to burn longer, hotter, and cleaner than traditional firewood (read more about briquette technology).
And when it comes to wood briquettes, traditional Sawdust Briquettes are without a doubt the most popular type. They’re inexpensive, easy to use, and have been used in British homes since the Victorian era. Thanks to their high energy density and space-saving shape, sawdust RUF bricks offer a practical way to heat your home without turning it into a woodshed (read more about wood fuel storage).
According to over 30,000 real customer reviews, Lekto Woodfuels’ Sawdust Briquettes are the best RUF bricks you can find in Britain. Originally launched in 2016 as Day Briquettes, a companion product to our 8-hour Night Briquettes, Sawdust Briquettes are an excellent choice for everyday heating in wood-burning stoves, multi-fuel stoves, and all other wood-burning appliances (read: What Is The Best Stove For You?).
But what makes Lekto Sawdust Briquettes so much more efficient than traditional firewood? Read this expert-written blog post to explore the benefits, heat output, burn time, and use cases.
You Might Also Like:
Best Supermarket Logs: Asda, ALDI, Tesco, LIDL, Sainsbury's
The Rise and Fall of Coffee Logs
What Are Lekto Sawdust Briquettes?
Lekto Woodfuels’ sawdust briquettes are a popular type of solid wood fuel made by compressing dry hardwood sawdust into dense, brick-shaped blocks. Each briquette has an energy density of 5,100 Watts per kilo, which is a lot more than even the densest kinds of hardwood.
Unlike traditional firewood logs, which are cut directly from timber, Lekto Sawdust Briquettes are produced using leftover sawdust generated by the sawmill industry. The sawdust is dried and compressed under high pressure to create a compact fuel brick.
No binders or glues are necessary, as natural lignin, already present in the wood, helps bind the particles together. The result is a convenient, ready-to-use fuel that combines natural hardwood with the practical advantages of modern briquette manufacturing.
Upon visual inspection, you will notice that our briquettes are visually whiter than competing products because we use 100% pure hardwood sawdust. You will also notice they’re a bit denser than competing options because we use state-of-the-art industrial pressing rods.
Lekto Sawdust Briquettes at a Glance:
- Calorific value of 5,1 kWh per kilogram.
- Made from 100% pure white hardwood sawdust.
- Extra-low moisture content for an extra-clean burn.
- Compressed to extra-high density with an industrial pressing rod.
- No chemical glues or binders used during production.
- Ready to Burn certified (WS370/00005).
Read Ultimate Guide to Wood Briquettes.
Why Choose Lekto Sawdust Briquettes?
1. High Heat Output With Low Moisture Content
One of the biggest advantages of Lekto Sawdust Briquettes is their exceptionally low moisture content.
While regular Ready to Burn firewood can contain up to 20% moisture, Lekto Sawdust Briquettes often contain less than 9% moisture. This is equivalent to the moisture content of wheat flour or dry cat kibble. Read our article about wood moisture meters.
Why is this important?
When you burn wet wood, some of the fire's energy goes into evaporating the water inside the logs. This leaves less energy available for useful heating. With drier fuel, less energy is wasted evaporating this excess moisture.
Couple that with an extra-high energy density of 5.1 kWh/kg, and you get an incredibly efficient home-heating solution. Their dense construction and low moisture content provide a reliable, steady heat source, especially compared with damp or poorly seasoned firewood.
2. Long-Lasting Heat With Minimal Tending
We all love natural fires. But let’s face it. Nobody wants to spend the whole day babysitting the stove and adding logs. Lekto Sawdust Briquettes deliver dependable heat without frequent refuelling.
While they’re not as long-burning as our 8-hour Night Briquettes or Universal Fire Logs, Sawdust Briquettes still provide up to 2 hours of stable, cost-efficient heat. This is two to three times more than the average cut of regular hardwood firewood.
Plus, their uniform shape makes them easy to position in your stove. This makes them especially convenient for daytime heating when you want a warm home without constantly tending the fire.
3. Natural Hardwood Sawdust, No Added Chemicals
Not all wood briquettes are equal. Lekto has always prided itself on using only the highest-quality natural materials. Our Sawdust Briquettes are made from 100% hardwood sawdust, with no added glues or chemical binders. During production, the sawdust is compressed into a solid briquette using state-of-the-art industrial equipment that allows the lignin contained in wood fibers to act as an all-natural binding agent.
4. A Practical Way to Make Use of Sawmill By-Products
Sustainability is another important reason why many households choose sawdust briquettes. Manufacturing Lekto Sawdust Briquettes provides another avenue for reusing leftover hardwood sawdust generated during sawmilling. By turning this material into a useful heating fuel, briquette manufacturing adds value to an existing wood-processing by-product.
This approach supports more efficient use of timber resources.
5. Compact, Convenient and Easy to Store
Traditional firewood can take up considerable storage space, especially if you want for stock up on fuel for the colder months. Lekto Sawdust Briquettes offer a convenient alternative.
First, they have a much higher energy density than regular briquettes. Second, their regular, brick-like shape lets you stack them neatly, helping you use space more efficiently.
Each mini-pack contains 20 briquettes and weighs approximately 17 kg. The briquettes come in our signature compact cardboard boxes that stack on top of one another. This makes them convenient to handle and organise.
Whether you store your fuel in a garage, utility room, or suitable indoor storage area, their compact packaging makes keeping a supply of heating fuel much simpler. Remember, briquettes must be protected from moisture to maintain performance.
Lekto Sawdust Briquettes: Key Specifications
Here's a quick overview of what you can expect from Lekto Sawdust Briquettes. Their low moisture, high calorific value, and practical packaging make them an attractive option for households looking for a convenient everyday wood fuel.
- Product material: 100% hardwood sawdust
- Calorific value: 5.1 kWh/kg
- Manufacturing process: Industrial RUF briquetting press
- Ready to Burn certificate number: WS370/00005
- Product height: 155 mm
- Product width: 90 mm
- Product depth: 65 mm
- Product weight: 0.85 kg
- Briquettes per box: 20
- Box weight: 17 kg
- Outer packaging: 100% cardboard
- Inner packaging: Low-density polyethylene (LDPE)
- Recycling information: Fully recyclable
- Box height: 333 mm
- Box width: 344 mm
- Box depth: 269 mm
- Box volume: 30.8 litres
How to Use Sawdust Briquettes in a Wood-Burning Stove
- Open the air vents. Set the air controls of your wood-burning appliance to their most open position in accordance with the manufacturer’s instructions.
- Build your fire. We recommend using the top-down method. Place your Sawdust Briquettes at the bottom, then add your Kindling and Natural Firelighters on top.
- Start your fire. Use a match or a lighter to set fire to your Natural Firelighter. It will set your kindling on fire, which will, in turn, light your Sawdust Briquettes.
- Reduce the airflow. When the Sawdust Briquettes are burning nicely, close the air controls to ensure optimal heating and burn time.
For more information about wood fuels, read our Ultimate Guide to Briquettes.
How Should You Store Sawdust Briquettes?
Proper storage keeps your briquettes in prime, clean-burning condition. Because sawdust briquettes are compressed from dry wood particles, they can act as a sponge and absorb moisture when exposed to damp conditions. Excess moisture can soften the briquettes, cause them to deteriorate, lose their shape, and smoke when burned. To prevent this, store them in a dry, well-ventilated space, preferably in their original packaging until needed. Avoid leaving briquettes directly on damp floors or exposing them to rain and condensation.
Frequently Asked Questions About Lekto Sawdust Briquettes
How Long Do Lekto Sawdust Briquettes Burn?
Under proper use conditions, you can expect your Lekto RUF Briquettes to burn for 1.5-2 hours. Actual burn time depends on various factors such as airflow settings, stove design, ambient temperatures, and the amount of fuel used.
Are Sawdust Briquettes Better than Traditional Firewood?
Sawdust briquettes offer several advantages over traditional firewood. The main ones are their low moisture content, uniform size, and compact packaging, which make them convenient to use and store.
Are Lekto Sawdust Briquettes Chemical-Free?
Lekto Sawdust Briquettes are made from hardwood sawdust without added chemical binders, glues or adhesives. Natural lignin within the wood helps hold the compressed material together.
Can I Use Sawdust Briquettes in a Multi-Fuel Stove?
Yes, you can use sawdust briquettes in multi-fuel stoves and other wood-burning appliances.
Are Sawdust Briquettes Environmentally Friendly?
Sawdust briquettes use a by-product of the sawmilling industry. Producing them helps reduce sawmill waste. Likewise, their extra-low moisture content helps reduce PM emissions when compared to burning the wood as firewood.
What's the difference between Sawdust Briquettes and Night Briquettes?
Lekto Sawdust Briquettes are designed for convenient everyday heating and provide a relatively strong, steady burn. Lekto Night Briquettes are designed for a slower, longer-lasting burn. The best choice depends on how much heat you need and your appliance's operating requirements.
Explore Lekto Sawdust Briquettes today and discover a practical way to keep your home warm.
Curious about who we are? Read everything you need to know about Lekto. Want more? Read 9 Reasons Lekto Is the Best Wood Fuel Supplier.