Olsberg GmbH - Königshütte Libra
Olsberg GmbH - Königshütte
Condensation risk
Worst case (old uninsulated masonry chimney, U≈2.5 W/m²K, −10 °C): inner wall drops below dew point 55 °C from approx. 4 m height. A modern insulated stainless-steel chimney avoids this.
Diagrams
Condensation risk
Inner chimney wall temperature over height — modern insulated (U≈0.6) vs. old masonry (U≈2.5). Condensation occurs when the inner wall drops below the acid or water dew point.
Draft balance
Natural draft vs. required draft pressure — shows from which height enough draft develops.
Flue gas core vs. inner wall
Gas core temperature (dashed) and inner wall temperature (solid) at winter -15 °C — the inner wall reaches the dew point much earlier and decides whether condensation occurs.
Metric comparison
Appliance metrics relative to the average of all appliances using the same fuel (100% = average).
Emissions & ratings
Compliance against the major European emission standards.
Certifications
Operation & compatibility
Operating modes and approvals declared by the manufacturer.
Fuels
Geometry & design
Physical dimensions and outer materials.
- Dimensions H×W×D
- 1176 × 556 × 460 mm
- Viewing window H×W
- 529 × 446 mm
- Weight
- 154.211 kg
- Base shape
- rund
- Cladding
- Stahl, Naturstein
- Colour
- schwarz, grau
- Efficiency
- 80 %
- Max log length
- 33 cm
- Viewing window H×W
- Frontkamin: 1 Scheibe, Frontscheibe
- Baking compartment
- ohne Backfach
Test certificate
Test report and identification numbers.
- Standard
- DIN EN 13240
- Year
- 2019
- Institute
- Feuerstättenprüfstelle Kahl GmbH
- Report no.
- FK 40 19 598
- Article no.
- 28/915
Data sources: schornstein
Technical parameters
- Appliance
- Olsberg GmbH - Königshütte Libra
- Manufacturer
- Olsberg GmbH - Königshütte
- Fuel
- Wood
- Rated output
- 5 kW
- Exhaust temperature
- 357 °C
- Exhaust mass flow
- 3.2 g/s
- CO₂ content
- 7 %
- Operating pressure
- 12 Pa (overpressure)
- Connection diameter
- 150 mm
- Water dew point (approx.)
- 55 °C
- Acid dew point (approx.)
- 70 °C