Pressholz-Briketts: The discreet wood alternative that can triple usable heat

Many stove owners don’t realise that an unassuming alternative to logs can turn their stove into a genuine heating powerhouse.

When people picture stove heat, they often imagine metres of split logs stacked under a carport or in a shed. Yet experts are increasingly pointing to a fuel made by compressing wood leftovers, which can deliver up to three times more usable heat in the stove than traditional logs. If you’re aiming to cut costs and keep an eye on emissions, it’s worth a closer look.

What’s behind so-called Pressholz-Briketts

Pressholz-Briketts-often referred to as Holzbriketts or compressed wood logs-are made from sawdust and leftover wood from sawmills or the furniture industry. These residues are compacted under very high pressure, without any added binders.

The result is a highly dense, uniform fuel with clearly defined properties. While standard Scheitholz can vary significantly depending on species, storage and moisture level, these briquettes deliver far more consistent performance.

"The big advantage: up to 300 percent more usable heating energy per kilogram compared with damp or only moderately dry firewood."

Their low moisture content-usually under ten per cent-means hardly any energy is wasted evaporating water during combustion. That’s exactly where the major efficiency gain comes from.

Why the heat output is so much higher

High calorific value thanks to low residual moisture

Pressholz-Briketts typically achieve a calorific value of around 4,8 to 5,2 kilowatt-hours per kilogram. Well-seasoned Scheitholz is more likely to sit in the range of two to three kilowatt-hours per kilogram-especially when it still contains 20 to 30 per cent water.

• Pressholz-Brikett: approx. 4,8–5,2 kWh/kg
• classic firewood: approx. 2–3 kWh/kg

So if you heat with briquettes, you need noticeably less fuel to reach the same room temperature. You’ll feel the difference when ordering, carrying, and ultimately on the bill.

Cleaner, more even combustion

Because the briquettes are so dense and homogeneous, they burn more calmly and steadily than many wood logs. They produce less smoke, fewer sparks and significantly less ash.

That’s kinder to:

• the chimney, because there’s less soot and fewer deposits,
• the stove’s glass, which blackens more slowly,
• your finances, as the system needs cleaning and servicing less often.

"Less ash, less mess, less work-for many stove owners, that’s almost the nicest side effect."

Space problem solved: storing on a small footprint

Anyone living in a city knows the issue: a full metre of split logs can quickly take over half a cellar or garage. Pressholz-Briketts are much more compact and stack neatly.

Compared with conventional Scheitholz, around a quarter of the storage space is enough to achieve similar heating performance over winter. That’s possible because the fuel is denser and contains more energy.

• Up to four times less storage space needed compared with many log stacks
• Supplied in manageable packs, often wrapped in film
• Easier to carry and cleaner to handle

For households without a large shed or garden, that’s a practical advantage. A few packs on a cellar shelf can cover several evenings by the fire.

Environmental balance: heating with waste instead of trunk wood

These briquettes are produced from by-products of the wood industry that would otherwise often be burned or disposed of. Using them as heating material turns a leftover stream into a valuable energy source.

"Pressholz-Briketts make use of existing wood residues and therefore ease pressure on forests and forestry."

Because the residual moisture is low and combustion is relatively complete, they generate less fine particulate matter and fewer soot particles than damp firewood. If you live in an area with strict air-quality rules, this can reduce the risk of running into emissions-related issues.

Direct comparison with classic Kaminholz

Property	Pressholz-Brikett	Scheitholz
Calorific value per kg	approx. 4,8–5,2 kWh	approx. 2–3 kWh
Moisture content	< 10 %	20–30 % (typical)
Storage space required	strongly reduced	very high
Amount of ash	low	high
Raw material source	wood residues, recycling	trunk wood

How to use Pressholz-Briketts correctly

One detail is often overlooked: briquettes need a certain base heat to get going. If you treat them like ordinary kindling, you’ll quickly end up disappointed. With the right method, however, it works without fuss.

Step-by-step use in a Kaminofen

1. First, build a strong starter fire using small, very dry kindling or natural firelighters.
2. Wait until a solid bed of embers has formed.
3. Place one to two briquettes onto the embers, not too close together so air can circulate between them.
4. Open the combustion air generously at first until the briquettes are properly burning.
5. Then reduce the air supply slightly to achieve a long, calm ember phase.

A dry storage spot is essential. If briquettes are kept in a damp cellar or directly on concrete, they absorb moisture and lose part of their advantage. A dry, well-ventilated room and a slight raise-off-such as wooden pallets-help prevent this.

What to look for when buying

Not every product performs equally well. You can usually spot quality by a few signs:

• as light and even a colour as possible, with no foreign matter or visible plastic residues,
• a firm, stable shape that doesn’t crumble in your hands,
• clear information on moisture level, wood origin and the manufacturing process,
• ideally, certifications or quality seals indicating controlled standards.

You’ll find them via many channels: DIY stores, fuel merchants, agricultural co-operatives and numerous online suppliers. If you buy in larger quantities, you can often negotiate better prices-despite a higher per-kilogram cost than Scheitholz, it frequently pays off thanks to the significantly higher calorific value.

Which drawbacks you should realistically factor in

There’s no escaping a few downsides. Three points show up repeatedly in user reports.

Price, availability and handling

• Price level: The purchase price per kilogram is usually higher than loose Kaminholz. Because efficiency is higher, consumption drops, which noticeably softens the difference.
• Regional availability: In rural areas with many woodland owners, traditional firewood is often far more widespread. In cities, briquettes tend to come out ahead.
• Slightly more sensitive when lighting: Without a strong ember base, getting started can be harder than with a fast-burning log.

"Once you’ve found the right lighting technique, many users’ experience is that they mostly stick with briquettes-despite the slightly higher per-kilo price."

Who benefits most from switching

A complete move from a classic woodpile to Pressholz-Briketts won’t suit everyone. What is clear, though: certain groups gain the most.

• City residents with limited storage space,
• people who don’t want to-or can’t-carry tonnes of wood,
• households with modern Kaminöfen designed for dry fuel,
• environmentally minded users who value the sensible use of wood residues.

If you have a very old stove with poor air control, or you can source your wood almost for free from your own woodland, you’re likely to view the extra cost more critically. For many others, a mix is appealing: traditional logs for long-lasting baseline warmth, and briquettes for quick, targeted heating in the evening.

Practical everyday tips for using Pressholz-Briketts

A few small habits make day-to-day use much more convenient. For example, many users keep a box of loosely broken-up wood next to the stove. That lets you build a strong starter fire quickly, then add the briquettes on top.

It’s also worth re-learning how your stove’s air controls behave. Because briquettes burn differently from typical logs, the stove and room temperature can respond in a slightly different way. If you consciously observe over a few evenings how quickly the room warms up and how long the embers hold, you’ll soon find settings that match your home and daily routine.

Overall, compressed Holzbriketts are an appealing option for anyone who loves a wood fire but no longer wants to battle half-dry Scheitholz, large amounts of ash and overflowing wood stores. For many households, this fuel could become the quiet star of the next heating season.