Wood chip boilers
High efficiencies (e.g. up to 96.2% for the Eco-HK 20–60 according to type testing with standard test fuel), economical operation and intelligent heating technology – these qualities are the hallmark of our wood chip boilers. We are proud that Hargassner has been a pioneer in the field of wood chip boilers. Our Eco-HK wood chip heating system is the result of decades of experience and in-depth expertise in this heating technology. The Eco-HK systems have been awarded the “Energie-Genie” Innovation Award, highlighting our unwavering commitment to innovation, quality, and excellence in the heating industry.
Wood chip boiler
Eco-HK
From conscious households to large-scale industrial heating systems
Eco-HK
This is what makes it unique
The wood chip boilers from the Eco series are the right choice for all applications that already require a medium to higher heating output. In cascade, i.e. up to six boilers connected in series, an output of up to 2 MW is possible. This is heating technology at its finest, equipped with numerous technical features for demand-based operation.
Eco operation
Speed-controlled EC exhaust fan
with negative pressure control
Hargassner uses EC exhaust fans in its Eco-HK boilers. The crucial advantage of technology is the electric speed control, which consumes very little electricity. The negative pressure unit constantly measures the pressure conditions in the combustion chamber. The TouchPro uses this data to control the speed of the exhaust fan, thus keeping the negative pressure at an ideal level. This supports low-emission combustion and enables efficiencies of up to 96.2%.
Fuel extraction
Thanks to a low drive output of just 0.18 kW (0.25 – 0.55 kW for 70 – 330 kW boilers) and an efficient and robust spur gear, the fuel extraction system operates with minimal energy consumption. With a gear efficiency of over 90%, it contributes to economical operation.
Automatic ignition
Two ignition elements are installed in the Eco-HK 130 – 330 series. Thanks to the design of this ignition element, the power consumption has been reduced to just 300 watts (up to 1,000 watts less) and, at the same time, the efficiency of the ignition process has been increased.
- Low energy consumption
- Smart ignition monitoring
- Silent operation
Convenient operation with different fuels
One boiler – three options
The rotary grates are positioned one behind the other with a “step” between them and can be moved independently of each other. As a result, pellets, various types of wood chips and even agricultural fuels such as miscanthus can be burned easily and conveniently.
Wood chips
Pellets
Miscanthus
Strong step grate
Closed grates in the combustion chamber with a high firebed – optimises the gasification process and minimises micro-dust emissions.
During the heating cycle, only the rear rotary grate is opened during the de-ash process. The ash falls down, the residual embers remain and enable further combustion of the newly extracted fuel.
The combustion chamber is cleaned completely before the boiler is restarted. Both grates open (rotate 360 °) and cold ashes and foreign bodies such as stones and nails are disposed of.
For fuel with a very low ash melting point, the rotary grate’s special “breaker function” will break the clinker.
The future of heating
Eco-HK
Fully refractory-lined combustion chamber
with standard recirculation
The refractory combustion chamber’s special storage effect guarantees high combustion temperatures (even for partial load), minimises the number of times the boiler has to be ignited and reduces emissions. Every Eco-HK has flue gas recirculation integrated as standard to combat ash clinkering caused by dry fuel or fuel with a low ash melting point. The residues can be disposed of via the ash extraction system without any problems, because the cooling of the firebed means that even low ash melting points of low-grade fuels are not yet reached.
Optimised cleaning
for high convenience
ALL heat exchanger tubes – including the first pass – are cleaned at regular intervals. The edges of the auger turbulators efficiently remove any fly ash residue from the boiler pipes and this drops straight onto the ash auger. Both the fly ash and the grate ash are transported into a fully integrated ash box by just one ash extraction auger. The residues are crushed as they are being transported and then compacted in the box, resulting in increased annual efficiency and a higher degree of cleaning convenience. With Eco-HK 20 – 230 kW, only one drive is required for heat exchanger cleaning and ash extraction.
Independent firebed
monitoring
Non-contact sensors monitor the height of the firebed, so an optimal combustion condition is achieved.
TouchPro
Control
The new TouchPro leaves nothing to be desired and impresses with its simple and intuitive operation.
Lambda sensor
control
The lambda sensor integrated into the control unit detects the calorific value of the fuel and thus regulates the optimum fuel/air mixture.
More Advantages Eco-HK
- Simple touch menu navigation
- Sophisticated heat distribution
- Automatically adjusts to weather conditions
- Various options for controlling your heating system remotely, ranging from your living room to while you’re out (via the app)
- Can be connected to various smart home solutions
Convenient & economical
Eco fuel extraction system from Hargassner
Thanks to the low drive power of just 0.18 kW (0.25–0.55 kW for the 70–330 kW models) and the efficient spur gear unit, the fuel extraction system is designed for low power consumption. The spur gear unit achieves an efficiency of over 90%. Its modular design allows easy handling of the auger and trough, featuring a removable cover.
Advantages of Eco-HK room discharge system
- Hargassner spur gear unit
Low friction loss with high efficiency of over 90% - Modular design for flexible planning
- Efficient use of storage space due to low installation height
- Low power consumption
- Quick and easy installation
- Economical
Unique filter technology
eCleaner
The Multicyclone & eCleaner particle separator operates on the electrostatic principle and is designed as a centrifugal separator. The electric field channels the flue gas through the pipes, while fine dust particles collect on the separator pipe’s inner wall. The separated dust is removed from the separator pipes via slide valves and discharged into the collection area.
Particle Separator
Unique filter technology
Fine dust emissions can be significantly reduced using the particle separator, depending on the type of heating material used. The eCleaner electrostatically charges the particles, which are deposited on the inner walls and then directed downward by the automatic cleaning device. An auger takes over the transport to the ash box.
- Little space required
- Fine dust is reduced to a minimum
- Automatic cleaning and transport to the ash box
- Simple retrofitting possible at any time (optional)
Multicyclone
combined with eCleaner
The stand-alone Multicyclone particle separator with eCleaner significantly reduces fine and coarse dust emissions, depending on the type of heating material. The Multicyclone’s design allows for easy integration into the flue gas pipe. It can be installed near the boiler or in another room.
- Especially for Eco-HK & Eco-PK 130 – 330
- Minimisation of the total dust
- Accessories: Large ash box
75 litre or AFS with 240 litre or 300 litre bin
Multicyclone
combined with eCleaner
The stand-alone Multicyclone particle separator with eCleaner significantly reduces fine and coarse dust emissions, depending on the type of heating material. The Multicyclone’s design allows for easy integration into the flue gas pipe. It can be installed near the boiler or in another room.
- Especially for Eco-HK & Eco-PK 130 – 330
- Minimisation of the total dust
- Accessories: Large ash box
75 litre or AFS with 240 litre or 300 litre bin
Up to six boilers for a maximum of 2 MW
Wood chip cascades
Because of the unique and targeted combination of up to six boilers, the power requirement can be optimally adapted to the seasons. Operational reliability and storage capacity are doubled, all at the best price-performance ratio.
- Maximum operational reliability
- Optimum low-load coverage
- Large discharge volume
- Optimum price-performance ratio
