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Combi Boiler

Combi Neo-HV
and Nano-PK

The best of wood log and pellets
Energy efficiency class: A+
Hot anniversary campaign - save now!

  • Automatic boilder cleaning system
  • Optional automatic ignition
  • Touch-Display
  • Fully refractory-lined highperformance combustion chamber for optimum post-combustion
  • One control unit for both boilers

Two fuels - one high-end solution

Premium heating combination for logs and pellets

This combi option is impressive because it consists of the Neo-HV wood log boiler boasting a large filling chamber and the Nano-PK pellet boiler with an automatic heat exchanger cleaning system and an innovative fuel extraction system.  Comfort is important for us: The wood log boiler is ignited automatically when the accumulator can no longer cover the heat demand. If the wood log boiler has not been filled, the system will switch to the pellet boiler. The pellets are suctioned out of their storage  room and into the hopper.

40 Years anniversary campaign: Order now and benefit from hot savings!
  • Automatic heat exchanger cleaning
  • Highest efficiency
  • Fully refractory-lined high performance combustion chamber for highest efficiency
  • Lambda sensor for fuel quality detection
  • Touchpad operation
  • One control unit for both boilers
  • Low space requirement
  • Variable installation possibilities
  • High comfort due to automatic switchover to pellets
  • Energy efficiency class A+
  • Automatic ignition optional
  • Optional Particle seperator

Our boilers in detail

of Neo-HV & Nano-PK


The combi boiler Neo-HV + Nano-PK was developed for the highest demands. Discover this top quality comfort miracle by simply turning, tilting or inclining.

Experience the two fully automatic boilers in high-quality 3D animation – right now on the screen. With augmented reality, you can visualise this comfort genius exactly and in the right size directly in your future boiler room. Simply click on the AR button and place, rotate and scale as desired using your mobile phone or tablet and you already have an exact picture of the integration of the Neo-HV + Nano-PK in your room.

All technical details and important components can be found in the following sectional drawing.

Open 3D model in a new window

Left – Wood log boiler Neo-HV 20–60

  1. Large filling door
  2. Large filling chamber for ½ m logs (up to 60 cm)
  3. Combustion chamber lining – prevents tar formation
  4. Heat-up door with automatic ignition (optional)
  5. Primary air motor
  6. Secondary air motor
  7. High-quality, massive refractory-lined combustion chamber
  8. High-temperature burnout zone
  9. Ash separation zone
  10. Lambda sensor
  11. Turbulators
  12. Heat exchanger
  13. Autom. boiler cleaning system
  14. Exhaust fan
  15. Top smoulder gas ventilation
  16. Optional back-end protection
  17. Cooling coil for thermal safety circuit
  18. Cleaning door
  19. Ash pan
  20. Standard filling chamber lighting

Right – Pellet boiler Nano-PK 6–32

  1. Fully refractory-lined combustion chamber
  2. Sliding grate
  3. Secondary air stream with inlet openings
  4. Primary air
  5. Ash pan
  6. Automatic ignition with 300 W
  7. Stoker auger
  8. Heat exchanger
  9. Turbulators with autom. boiler cleaning system
  10. Exhaust fan
  11. Pellet vacuum turbine
  12. Pellet day hopper
  13. Metering double rotary valve
  14. Lambda sensor
  15. Air connection AIO / ADO
  16. Fill level indicator
View 3D model View cross section


Nominal capacity (NC)
Fuel heat output
Minimum capacity
Electric capacity
NCV efficiency at nominal output
NCV efficiency at 30 % nominal output
GCV efficiency at nominal output
GCV at 30 % nominal output
Seasonal energy efficiency ETAs
Boiler temperature range
Measures (w x h x d)
Filling volume
Space requirement
Flue pipe diameter
Ash box volume
Water content
Energy label
    Neo-HV 20–30 / Nano-PK 6–15
    Nominal capacity (NC) 25,4–30 / 6,6–15 kW
    Fuel heat output 27,1–32,6 / 7,0–15,7 kW
    Minimum capacity 12,7–15 / 1,8–4,5 kW
    Electric capacity - kW
    NCV efficiency at nominal output (nn) in % 93,7–92,0 / 94,7–95,3 %
    NCV efficiency at 30 % nominal output (np) 92,8 / 94,7–94,9 %
    GCV efficiency at nominal output 84,1–85,9 / 87,2–88,4 %
    GCV efficiency at 30 % nominal output 83,5–83,6 / 87,6–87,8 %
    Seasonal energy efficiency ETAs 80–82 / 81–83 %
    Boiler temperature range 78 / 40–78 °C
    Measures (w x h x d) 660 x 1665 x 1310 / 700 x 1350 x 580 mm
    Weight 700 / 220 kg
    Filling volume 166 / - l
    Space requirement 0,79 / 0,45
    Flue pipe diameter 150 / 100 mm
    Ash box volume - / 13 l
    Water content 137 / 24 l
    Flow/Return 6/4" (1") / 1" "
    Boiler label A+ / A+