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Boilers & Heat Pumps

If you wish to switch to a lower-emission heating system, there are several options for generating heat with renewable energy for the benefit of the environment: pellet, log or heat pump heating.

Home Technology
Become a conductor

Our BRUNNER home technology is practical, easy to use and full of benefits for the user. See what the abbreviations EAS, EOS and USA means and how you will enjoy using these "little helpers".

Secure guarantee extension now

Register your BRUNNER product within the first three months and you will receive a further warranty extension in addition to the usual BRUNNER warranties.

Pellet heaters
Sustainable: heating with renewable energy
To the Brochure

Pellet heating

The most comfortable way to heat with wood

Fully automatic from the pellet store to the heater

Every product can only become as good as its builder's aspirations dictate. We always work with the aim of building the best boilers and heating solutions for wood fuel. Heating the Bavarian way.

As comfortable as oil heating, but with renewable and regionally available fuel. The wood pellets are delivered in a truck and blown into the store room of the building. The annual tank and the boiler are connected via a hose system. The pellets are automatically "sucked in" by the boiler. Ignition, control, boiler cleaning and ash removal are also fully automatic in a pellet heating system.

  • Turnkey and reliable comfort solutions
  • Ideal for detached houses and apartment buildings
  • Suitable for new and old buildings
  • Combination with photovoltaics or solar thermal energy possible
  • Eligible for subsidies
  • Made in Germany
With its smallest CO² footprint, the pellet condensing boiler is probably the most efficient way to heat. It is also one of the smallest in the world and can fit into even the smallest boiler room.
The small compressed pieces of wood are a wonderful fuel made from a valuable, renewable raw material that burns almost CO2-neutral.
Where a large pellet store in the form of silos or similar is not possible, the pellet heating system can be extended by a weekly container. This makes it possible to fill with individual sacks as required.
Pellet heating
BPH 4/15
Pellet heating
BPH 4/17
Pellet heating
BPH 7/24
Pellet heating
BPH 7/25
Pellet heating
BPH 9/30
Pellet heating
BPH 9/32

One of the smallest pellet condensing boilers in the world

Heating even more efficiently with condensing technology: This technology extracts the remaining heat from the flue gases. The water vapour contained in the exhaust gases is condensed. The heat thus released is additionally fed into the heating system. The efficiency is up to 15 % higher than that of a conventional pellet boiler. 

With a footprint of only 0.53 m² (0.84 m² incl. hot water tank), space problems disappear completely. The boiler output automatically adjusts to the heat demand in a wide range from 4 kW to 17 kW. With the tested supply air set, room-air-independent operation is permitted in new buildings but also in existing buildings that have been renovated for energy efficiency. With a flue gas pipe from the boiler to the chimney, the BPH is also available as a calorific value version with a higher flue gas temperature and can usually be operated without problems on existing chimneys up to a diameter of 150 mm (5.9 inches). If a chimney renovation is necessary, BRUNNER supplies a coordinated chimney renovation package in DN 100 mm. Fuel supply is simple: with a weekly container with a footprint of only 0.36 m², a bag silo or larger pellet store.

Pellets instead of oil

The change from an old oil heating system to pellets is simple. The BRUNNER pellet boiler is installed instead of the old boiler. Dimensions, connections and control are designed in such a way that the connection to the existing central heating system can be made without great effort. The pellet store is set up in the old tank room. With fabric tanks, this can be done quickly and without structural measures.

The pellets arrive at the boiler fully automatically. In kit system solutions, pneumatic suction systems have proven reliable. The pellets are extracted from above with a movable suction head or from below by means of permanently installed suction probes. The pellet boiler is equipped with appropriate hose connections and has an integrated suction turbine.

Emissions and efficiency

With its smallest CO² footprint, pellet combustion heating is probably the most efficient way to heat. When using surface heating systems such as underfloor heating, the flue gas temperatures are in the range of 28-38 °C. (82.4 - 104 degrees Fahrenheit) The emission values are far below the strict legal threshold values without additional separation and filtering equipment. This once again demonstrates the well-known excellent combustion quality of all BRUNNER products. Boiler pump, expansion vessel, boiler safety group, controls for boiler, heating circuits, hot water and solar are all integrated.

In conjunction with the BRUNNER heating centre the BPH can be extended and combined as required: Hot water preparation via fresh water station, additional heating circuits, use of surplus solar power (PV integration). And all this with a single control and a uniform user interface: With just one glance at the glass touch display, you can see all the important parameters regarding the status of the boiler as well as buffer tank temperatures. A simple and
clear display ensures self-explanatory operation of the
entire heating system.

Fuel dosage
Airflow sensor
Connection heating circuit
Connection boiler
Expansion tank
Ash pan
Touch display
Connection heating circuit
Connection boiler
Automated pellet feeding
Pellet day tank 32 kg
Differential pressure sensor
Burn back protection
Lambda sensor
Ignition element
Feed auger
Automated ash removal
Waste water connection with syphon

Practical tips

The BPH is the only pellet boiler on the market with infinitely variable fuel metering and combustion control via lambda probe and differential pressure transmitter (air flow measurement). This completely compensates for all fuel quality, supply air and flue gas routing and ambient conditions. The excellent calorific value utilisation is also possible with buffer operation and a spread of up to 50 K between the flow and return temperatures. A return flow boost is not required. Due to the low boiler water content and an optimised ignition strategy, it reacts very quickly to heat demand. The charge pump and expansion vessel are integrated in the boiler. Operation directly on heating circuits and hot water tanks are also possible without a buffer tank. A 200 litre hot water storage tank is also available.

Operation and maintenance

The BPH runs remarkably quietly and is designed for low-maintenance operation. Automatic cleaning and sliding combustion grate ensure low operating effort. Emptying the ash box is necessary approx. 3-4 times per year, depending on fuel requirements - this is displayed on the control panel.

Condensing boiler technology

Condensing technology from BRUNNER can be combined with radiators, underfloor or wall heating. Especially with low-temperature heating systems, the return temperature is low enough to trigger condensation of the water vapour in the flue gas.

With conventional combustion, the unused flue gases with their water vapour content escape through the chimney at a relatively high temperature. This "residual heat" can only be used for heating with condensing technology. By further cooling the heating gases in the boiler, the flue gas losses are minimised and the water vapour contained condenses in the heat exchanger. The additional heat gained from the condensation and the lower flue gas temperature is fed into the heating system. Heating systems with condensing technology make almost complete use of the heat content still contained in the exhaust gases of pellets. This additional yield of max. 15 % for pellets is at the same time the energy saving that is possible with condensing technology. Condensing technology also cleans the flue gas naturally. The emissions are thus significantly below the requirements of environmental labels such as the "Blue Angel". With a condensing boiler, not only can energy costs be reduced, but the environment can also be protected. The law supports this contribution with particularly attractive subsidy programmes.

The ideal conditions for operating a condensing boiler:

  • Humidity-insensitive chimney (stainless steel or ceramic)
  • Low-temperature heating system such as underfloor or wall heating. Heating systems with return temperatures > 40 °C (e.g. radiators) are technically possible, but not as efficient.
  • Condensate drain into the duct connection

Unique concepts

System solutions with function guarantee

A heating system is only as good as the interaction between heat generators and consumers. At BRUNNER, all components of a log and pellet heating system are matched to each other in terms of control technology. 


Everything fully automatic, low-maintenance and quiet - from ignition to ash removal. The ash container only needs to be emptied three to four times a year. All messages appear automatically on the display.


The output range adjusts to the current heat demand automatically
The infinitely variable, speed-controlled fuel metering system supplies the heating system with 4 to 17 kW.


The integrated differential pressure measurement takes into account natural fluctuations in the negative pressure in the chimney and in the combustion air line (weather influences, seasons). Only the amount of air required for the required output is supplied. Fluctuations in fuel quality and quantity are detected during combustion by the integrated lambda sensor. In this combination, emission values significantly below the legal threshold values are achieved. Additional separation and filter devices are not required. The guarantee for a positive result in the recurring measurement by the chimney sweep.

Everything in view

Simple and intuitive operation

With the touch display, you always have your heating in view. All functions are displayed and operated centrally. In the online access to "my heating", the familiar display view is reproduced 1:1. Simply register with myBRUNNER and install the app. Access to your own heating is possible with any internet-capable end device.


A heating system that anyone can operate.

BRUNNER boilers have an integrated touch display. A quick glance is enough and the current heat situation of the building is recorded. All functions of the heating system - and not just those of the boiler - can be set and operated via the graphic interface. A second display with a white or black glass plate can be installed in the living room or entrance area. This way, you always have a quick overview of the current heating situation.

There is always room for pellets

4 m² floor space is sufficient - with or without cellar

This statement is not only made by customers who used to heat with oil. As a rule, the space where the oil tank used to be is sufficient here to store the year's requirement of pellets in a prefabricated silo. Not as sacks, of course. The pellets are blown dust-free from the tanker into a fabric silo or store room. From there, the quantity required by the boiler is "sucked in" fully automatically as needed. Either via a suction probe or diverter from below or a so-called pallet mole. This works extremely efficiently and diligently, as you can see in the video. Even in new buildings or in buildings without a cellar, space can be found for the year's supply of pellets thanks to flexible storage solutions. 

Pellet removal systems - safe and dust-free

The annual demand determines the size of the pellet store

The pellet store should be designed to hold the entire annual requirement of pellets. Depending on the heat demand of the building or the previous oil demand, the required amount of pellets and thus the store size is determined. For example, this is approximately 2 tonnes of pellets if approx. 1,000 litres of heating oil were previously consumed - this results in a heating requirement of around 8,000 kWh per year. Due to the good utilisation of space and the professional connection points for quality-preserving loading and removal, prefabricated storage systems for indoor and outdoor use are used.

Weekly container
Fabric silo with suction diverter
Fabric silo with pellet mole
Store room with mole
Store room with suction probe
Earth silo with pellet mole

No PLACE for a silo?

Choose the smallest "pellet store": the weekly container for manual filling. The ideal alternative if the storage container only needs to be filled every one or two weeks - such as in a new building. Pellets are offered in bags of 15 kg each and are easy to store. When full, the BRUNNER weekly container holds 300 kg of the wood pellets, which are automatically removed from below by a suction probe.

Compact and expandable

  • The entire heating system requires no more than 1m² of floor space
  • Stable construction enables transport with stair cllimber and sack trucks
  • Expandable with 200-litre hot water tank
  • Storage container for manual filling for a quick switch to pellets or as an alternative to the annual silo
Concept 1

Pellet heating KOMPAKT

The heating solution with the smallest space requirement. Everything a modern heating system needs in a single-family house and all that on a floor area of 1 m². The most compact solution if an existing oil heating system is to be replaced.

  • Condensing technology for direct connection to two heating circuits incl. hot water.
  • Matching 200-litre hot water tank (BWS 200).
  • Existing hot water tank with/without solar system (solar thermal energy) can still be used and integrated into the control concept.
  • Optional photovoltaics for hot water
Concept 2

Pellet heating KOMFORT

The flexible and convenient solution for renovation and new construction with a 750 litre buffer storage tank for heating, hot water and solar energy (photovoltaic and solar thermal energy).

  • Condensing or calorific value technology
  • Water heat storage tank of 750 litres with integrated heat exchangers for hot water and solar thermal energy.
  • Drinking water heating as required, "instantaneous water heater" principle (pipe coil exchanger)
  • Option photovoltaic and solar thermal energy for heating and hot water. (With solar thermal energy, the second heating circuit is omitted on the control side.)
Concept 3

Pellet heating PLUS

Everything is possible. A sophisticated and pre-assembled heating system that also allows complex heating technologies with different heat generators and is guaranteed to work. Ideal for apartment buildings, semi-detached houses, new buildings with granny annexes and sophisticated heating solutions with multiple heat generators.


  • Condensing or calorific value technology
  • Stratified storage tank with 750, 1000, 1500 or 2000 litre capacity
  • Preassembled hydraulic box for several heat generators and consumers
  • Drinking water heating as required, principle "plate heat exchanger”
  • Optional photovoltaic and solar thermal energy for heating and hot water

How about an alternative heating concept?

Heat pump
Now heat even greener
Learn more
Water-bearing stoves
A stove as a hot water generator
Learn more
Log heating system
The most original way to heat with wood
Learn more
  • Due to the low-emission combustion, BRUNNER pellet boilers do not require a particle separator or fine dust filter.
  • Our pellet boiler is well below the limit values of BImSchV, stage 2 - and with the best efficiency.
  • The patented two-stage high-temperature vortex combustion chamber in the BRUNNER pellet boiler ensures the greatest possible heat transfer.
  • The automatic heat exchanger cleaning contributes to a constantly high boiler efficiency.
  • The better combustion of BRUNNER pellet boilers ensures less ash and longer emptying intervals.
  • The spacious ash box is integrated into our pellet heating system to save space.
  • The externally mobile ash box can be conveniently transported like a travel trolley.
  • The casing of BRUNNER pellet boilers can be removed without tools.
  • Exact graphic display of the fuel supply in the daily container as well as in the pellet stove.
  • All operating states can be permanently queried and archived.
  • Regular display of the ash volume - up to the request to empty the ash box.
  • Control anywhere and at any time online with PC, tablet or smartphone using the myBRUNNER App.
  • BRUNNER pellet boilers have whisper-quiet operation, low standby losses and minimal own power requirements.
  • The eight-chamber rotary feeder with separate drive motor contributes to 100% burn-back safety in our pellet heating system.
  • The separately driven metering and charging screws in BRUNNER pellet boilers provide additional fuel supply.
  • Generously dimensioned and dust-protected drives make BRUNNER pellet boilers particularly safe to operate.
  • BRUNNER pellet boilers are made of high-quality and environment-friendly materials - for a long service life.
  • We give a five-year guarantee on our pellet boilers when a maintenance contract is concluded; this also applies to wear parts.

The design of the BRUNNER pellet boiler user interface enables all operating steps to be carried out intuitively by a short touch.

  • Up to three touch displays can be connected.
  • Determination and balancing of heat yields including standard performance measurement.
  • Automatic archiving of heat yields, sensor values, information and fault messages.
  • PIN code protected service level with various analysis functions for the service technician.
Looking for the right heating system?

Make an appointment for a free consultation and let us work together to determine the ideal heating device for your home. We look forward to your visit.

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customer testimonials

That's what our customers say about BRUNNER

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This year, in the summer of 2022, a new Brunner WF 33 insert was installed in my current tiled stove (36 years old) by the specialist company Schömig from Höchberg/Würzburg. Batch no. C011.002-05.000.787010. With the start of the heating season, our new WF 33 burns almost every day and we are every time more and more enthusiasti...
Körner Otmar
Better some euros more for the brand quality of BRUNNER
Ralf Lenz: Dear Ladies and Gentlemen, The chimney sweep just came. He wouldn’t believe that we had left our stove burning all winter. It turns out that it's better to spend a few euros more on brand quality such as a Brunner stove than to buy cheap junk. It pays off in the long run - and the environment is happy too :-) Cordia...
Ralf Lenz
We heat the first winter with a stove installed by stove builder Stefan Hock from Bessenbach. Not only does the stove look great and fit perfectly into the picture, it also makes you really warm, and with far less wood than we needed before.
Krause Birgit
After we got a new gas condensing boiler in 2017, Kachelofen Schulz from Rastatt-Rauental built a water-bearing heating fireplace for us at the same time. We are still totally enthusiastic about this combination, Mr. Schulz also showed us wonderfully how to fire optimally and burn wood effectively. Now we have obtained another B...
Weschenfelder Hanne u. Wolfgang
The HKD 5.1 of BRUNNER is a product of top class
Michael Schmidkonz: Dear Ladies and Gentlemen, We have bought a Brunner HKD 5.1 tiled stove. It is a top class product. Whether for ignition, continuing to heat or keeping embers burning - simply outstanding! With kind regards from Tirschenreuth Michael Schmidkonz
Michael Schmidkonz
Our tiled stove was put into operation 37 years ago. Our chimney sweep is very enthusiastic. He has also already taken measurements with my consent. Top values  
Kehl Herbert
Competent service technicians can no longer be taken for granted today
Jochen Gräve, Niederwerth: Good morning, Yesterday, between 4:00 and 5:30 p.m., your service technician Mr. Kieswimmer changed the brackets on my masonry heater door and checked and readjusted various settings on the EOS. I would like to express my sincere thanks to Ulrich Brunner GmbH and especially to Mr. Kieswimmer for thi...
Jochen Gräve
Dipl.-Ing. Oberstudiendirektor
Ladies and Gentlemen, I am currently planning the installation of my second Brunner tiled stove with the expert advice of the master stove builder Josef Müller, Runding. For expert advice on the installation of the Brunner B4 in the existing heating system, I sought professional help from Brunner: Friendly reception, sound profe...
Mohr Heribert
A successful investment
Dear Sir or Madam After careful consideration, we decided to build an HK7 heating fireplace from Brunner and are happy with the decision. We would like to thank the stove building company Torsten Dix from 03205 Bronkow very much for the good advice and accurate execution on schedule. The fireplace is visually a modern jewel and ...
Schikorra Andreas
Corner fireplace of BRUNNER is the eye-catcher in the living room
Dr. Buch, Tutzing: Dear Ladies and Gentlemen, With the installation of the corner fireplace Architektur-Eck 38/86/36 from Brunner, our newly created living room has become a real eye-catcher. Without being obtrusive, it is a compelling fireplace installed in steel. The convincing quality-oriented technology and the perfectly...
Dr. Buch
Heating centre
Hydraulic box with system storage
Learn more
Water-bearing devices
Wood fire atmosphere with hot water generator
Learn more
For a flawless functioning of your heating
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