HDG K10-33
The HDG K10-33 is characterised by maximum economy in all areas and the particularly small footprint.
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Inside view of the boiler
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1 - Pellet suction system2 - Pellet reservoir3 - Stoker auger4 - Ash container5 - HDG Control6 - Cleaning system7 - Burner pot8 - Ignition9 - Ash removal mechanism -
Technical data
K10
K15
K21
K26
K33
Nominal thermal power (kW) 9,9 15 21 25,9 32,5 Power range (kW) 3,0 - 9,9 4,3 - 15 6,3 - 21 7,6 - 25,9 9,8 - 32,5 Flue gas mass flow (kg/s) 0,0058 0,0085 0,0118 0,0146 0,0180 Water capacity (l) 39 39 47 47 47 Max. permissible operating pressure (bar) 3 3 3 3 3 Flue draught requirement (Pa) 5 5 5 5 5 Permissible flow temperature (°C) 60-75 60-75 60-75 60-75 60-75 Permissible flow temperature for buffer operation (°C) 85 85 85 85 85 Dimensions and weight
K10
K15
K21
K26
K33
Height incl. reservoir with suction system (mm) 1705 1705 1705 1705 1705 Width with suction system (mm) 1075 1075 1075 1075 1075 Depth without flue gas pipe connection with suction system (mm) 710 710 780 780 780 Flue gas pipe diameter (mm) 130 130 130 130 130 Weight (kg) 261 261 283 283 283 Energy label
K10
K15
K21
K26
K33
Boiler energy efficiency class A+ A+ A+ A+ A+ Boiler + controller energy efficiency class (class VI) A+ A+ A++ A++ A++ -
3D view
Switching from oil heating to a pellet boiler
Pellet boilers are an established heating technology used in a wide range of applications. Depending on the building characteristics, heat demand and local conditions, they may represent an alternative to an existing oil heating system.
Depending on the applicable funding programmes and individual eligibility criteria, financial support may be available for the replacement of an oil heating system. The suitability of a pellet boiler should be assessed based on the specific project requirements.
Compact and practical
Suitable for a wide range of boiler rooms and designed for pellet operation across different operating conditions, the HDG K10-33 also offers extended ash removal intervals, depending on fuel quality and system use.
The small footprint, flush wall installation on three sides and easy insertion through a standard doorway make the HDG K10-33 particularly suitable for compact boiler rooms.
Replacing an existing oil heating system with a pellet boiler can be one option during heating system modernisation. The HDG K10-33 is designed for both renovation projects and new installations.
Fits through (almost) any door
The HDG K10-33 is delivered in separate components and can be brought into the building through a standard doorway. Thanks to its low weight (heaviest component: 170 kg) and compact dimensions, the pellet boiler is also suitable for installation in compact boiler rooms.
Easy installation
The HDG K10-33 is supplied largely pre-assembled. Only a small number of components need to be installed on site, without requiring water-carrying connections.
Highly space-saving
Thanks to its small footprint of only 0.75 square metres and its low height of 1.70 metres, the HDG K10-33 pellet boiler is suitable for installation in a wide range of boiler rooms. The flush wall installation on three sides and the flue gas pipe, which can be oriented upwards or to the rear, also provide a high degree of installation flexibility.
High-efficiency combustion technology
The combustion technology is designed to support compliance with applicable emission requirements. The precise air control system with a speed-controlled flue gas fan supports stable operation across different load conditions, including part-load operation.
Automated cleaning and ash handling
The burner pot and heat exchanger are cleaned automatically, and the combustion residues are compacted in the large-volume ash container. Depending on fuel quality and operating conditions, ash removal is required only at relatively long intervals. In addition to the entry-level version with an internal ash tray, a mobile ash container is also available as an option.
Low power consumption and quiet operation
The HDG K10-33 is designed for low electrical power consumption during operation. For example, the HDG K10 consumes approximately 28 watts during regular operation under specified operating conditions. The low-noise ignition element also supports quiet operation.
HDG K10-26 condensing technology
Condensing technology enables heat contained in the flue gases to be recovered and transferred to the heating system. This allows additional thermal energy from the fuel to be utilised.
System performance depends on operating conditions, fuel quality and system configuration.
The flushing function, consisting of two independent circuits, cleans the corrosion-resistant stainless steel heat exchanger and the condensate collector.
The boiler features a compact design and can be installed close to the wall on two sides. Delivery in separate components supports installation in buildings with restricted access.
The HDG K10-26 condensing boiler is available in four output sizes.
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Technical data
K10 calorific value
K15 calorific value
K21 calorific value
K26 calorific value
Nominal thermal power (kW) 10,5 15,9 22,3 27,5 Power range (kW) 3,2-10,5 4,8-15,9 6,7-22,3 8,2-27,5 Flue gas mass flow (kg/s) 0,0056 0,0079 0,0109 0,0132 Water capacity (l) 53 53 61 61 Max. permissible operating pressure (bar) 3 3 3 3 Flue draught requirement (Pa) -15 (negative pressure) to +5 (positive pressure) -15 (negative pressure) to +5 (positive pressure) -15 (negative pressure) to +5 (positive pressure) -15 (negative pressure) to +5 (positive pressure) Permissible operating temperature (°C) 75 75 75 75 Dimensions and weight
K10 calorific value
K15 calorific value
K21 calorific value
K26 calorific value
Height incl. reservoir with suction system (mm) 1705 1705 1705 1705 Width with suction system (mm) 1075 1075 1075 1075 Depth without flue gas pipe connection with suction system (mm) 1015 1015 1085 1085 Flue gas pipe diameter (mm) 100 100 100 100 Weight (kg) 277 277 298 298 Energy label
K10 calorific value
K15 calorific value
K21 calorific value
K26 calorific value
Boiler energy efficiency class A++ A++ A++ A++ Boiler + controller energy efficiency class (class VI) A++ A++ A++ A++
Video of the HDG K10-33
Find out how easy it is to heat with the HDG and experience our economical pellet boiler as used by our customers.
Absolute control
Perfectly regulated with the HDG Control
The new HDG Control is the intelligent control centre for your entire heating system. Whether on the large touchscreen on the boiler or via the app: With HDG Control, you always have absolute control over your heating system.
- Read information and make settings via the easy-to-use touchscreen
- Control of combustion and output
- Control of external heat sources
- Integration of solar thermal systems, accumulators, heating circuits, mains pumps, domestic hot water preparation, etc.
- On request: Full web access and app for iOS and Android
From the warehouse to the boiler
Flexible storage technology for every area of application
With pellets, heating can be convenient, including the storage of the compact wood pellets. Thanks to HDG's flexible discharge technology, pellet boilers can be installed in a wide range of building situations and configured to suit individual project requirements.
- Pellet mole: Ideal for individually planned fuel storage rooms and particularly quick to install. There is not usually any need for a sloping floor.
- Pellet suction probes: Most common storage system, because individual rooms are fully utilised. Variants with up to 8 probes are possible.
- Pellet fabric silo: Prefabricated pellet store, which is quickly installed without much planning effort. Can also be placed directly next to the boiler if no extra fuel storage room is available.