Erwin Koppe keramische Heizgeräte GmbH Nexus Aqua

Erwin Koppe keramische Heizgeräte GmbH

Wood

Rated output

11kW

+4.4 kW vs. avg

Exhaust temperature

225°C

−50.9 °C vs. avg

Exhaust mass flow

13g/s

+6.4 g/s vs. avg

Connection diameter

150mm

+4.6 mm vs. avg

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. 12 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.

EU Ecodesign

compliant

DE BImSchV

stage 2

Austria

compliant

Switzerland

compliant

Denmark

compliant

France (Flamme verte)

7 stars

Italy

3 stars

Certifications

A+EN 13240

Operation & compatibility

Operating modes and approvals declared by the manufacturer.

Continuous burningNo

Multi-flue suitableYes

Room-air independentNo

Central-heating connectionYes

DIBt approvalNo

CirculationWasserführend

Flue connectionoben

External combustion air100 mm

Fuels

WoodCoal

Geometry & design

Physical dimensions and outer materials.

Dimensions H×W×D: 1620 × 570 × 570 mm
Weight: 256.285 kg
Base shape: rund
Cladding: Stahl, Kachel
Colour: schwarz, weiß, grau
Efficiency: 80 %
Max log length: 30 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: 2012
Institute: RRF Rhein-Ruhr-Feuerstättenprüfstelle GmbH
Report no.: RRF - 40 11 2692
Article no.: 4500-10-01

Data sources: schornstein

Technical parameters

Appliance: Erwin Koppe keramische Heizgeräte GmbH Nexus Aqua
Manufacturer: Erwin Koppe keramische Heizgeräte GmbH
Fuel: Wood
Rated output: 11 kW
Exhaust temperature: 225 °C
Exhaust mass flow: 13 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