Class 5, ecodesign boilers

SlimKo Plus pellet boiler with a free-standing container

12-30 kW
  • SlimKo Plus is one of the smallest pellet boilers on the market
  • A boiler with a container located on the right or left side of the boiler allows for a longer period of operation of the device without adding fuel. In addition, the tank can be placed in a different room.
  • SlimKo Plus is equipped with a high-quality Revo PellasX pellet burner with a reinforced steel igniter, a rotating combustion chamber made of InCrox and a five-year warranty on the burner furnace,
  • boiler operation is controlled by the Plum 860P3-PE controller which supports up to 5 circulation pumps, a mixing valve actuator and additional automation,
  • The tank is made of galvanized steel. Powder coating in any color from the RAL palette – individual pricing.
  • Boilers with a higher standard – dust below 20 mg / m3 = higher subsidy!
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Basic Information


New, improved product!

We are sure that the SlimKo Plus boiler will become equally popular and will win the hearts of our customers. New product – available in powers of 12, 16, 20, 25, 30 [kW]. The heat source that is present in it is the PELLASX burner enjoying great popularity and recognition in Poland and in the world – the REVO model.

Advantages of the SlimKo Plus boiler with the Revo PellasX burner:
The furnace is made of high-alloy chrome-plated cast steel – characterized by a very long service life even when using fuel outside the classification,
Rotary furnace chamber with rotary cleaning, thanks to which there are no sinters on the burner,
Steel – ceramic lighter with a thread, with a faster ignition time and longer life,
Fan rotation sensor, the so-called HallSensor, stabilizing fan operation,
Hybrid drive of the fan and internal feeder, one common motor for both components
Built-in flap in the burner to prevent backfire and melting of the spiro pipe,
The burner housing is made of ABS resistant to mechanical damage,
Faster burner service and better access to actuators,
Innovative air supply

New version of the controller – PLUM 860P3-PE
Larger and clearer display
Improved algorithm of operation and power modulation – stable operation of the boiler at 2.1kW

A new type of temperature sensors – NTC10K
Greater accuracy of measurement,
Less interference when extending cables,
Increased mechanical resistance,

New type of external tray
Reduced power consumption – only a dozen Watt,
Feeder torsion spring – no welded elements,
More regular fuel doses

SlimKo Plus boiler with a side tray

Classic design and maintenance-free nature of operation make the SlimKo pellet boiler with a side tray a perfect solution for large and small central heating boiler rooms. Fully automatic control of the combustion process, control by the microprocessor system Plum 860P3-PE which supports up to 5 circulation pumps, a mixing valve actuator and additional automation guarantee reliable and efficient operation of the pellet stove in a multi-day cycle. Boilers with a SlimKo feeder meet all the standards of the 5th class and Eco Design, thanks to which their use will reduce the cost of central heating, making fuel combustion clean and fully ecological.

Pellet boiler with a feeder

SlimKo Plus is equipped with a high-quality Revo PellasX pellet burner with a reinforced steel igniter, a rotating combustion chamber made of InCrox and a five-year warranty on the burner furnace. The solid fuel container can be installed both on the right and on the left side of the stove, it can also be placed in another room. An automatic feeder is responsible for the fuel supply, the operation of which is controlled by a microprocessor control system. Thanks to this, exactly the amount of pellets that is needed to maintain the set temperature goes to the furnace.

Automatic control of a solid fuel boiler

The combustion process in solid fuel boilers is controlled by the technologically advanced ecoMAX 860P3-PE controller. The latest generation microprocessor system controls the heating circuit as well as CH and DHW, the mixer circuit with a pump and actuator, and a hot water pump with circulation. At the same time, the controller supervises all functions of the blower, burner and feeder, thanks to which the SlimKo pellet boiler with a side hopper is fully maintenance-free, and the operating activities are limited only to periodic refilling of fuel and emptying the ash chamber.

Efficient and economical central heating stove

Boilers for central heating for pellets and agro-pellets produced by KOTŁOSPAW Pleszew are available in 5 power options: from 12 kW to 30 kW. Depending on the power of the boiler and individual needs, it is possible to select a side container for solid fuels with a capacity of 330 l to 2100 l. optimal solutions.


  • Pellet

Price list

Check price list
Boiler power The size of the heated area Cena netto VAT Cena brutto
SlimKo Plus 12 kW 60-110 m²
80-150 m²*
13.943,09zł 3.206,91 zł 17.150,00 zł
SlimKo Plus 16 kW 110-160 m²
150-200 m²*
14.130,08 zł 3.249,92 zł 17.380,00 zł
SlimKo Plus 20 kW 160-200 m²
200-260 m²*
15.341,46 zł 3.528,54 zł 18.870,00 zł
SlimKo Plus 25kW 200-240 m²
260-320 m²*
15.886,18 zł 3.653,82 zł 19.540,00 zł
SlimKo Plus 30 kW 240-300 m²
320-400 m²*
17.495,93 zł 4.024,07 zł 21.520,00 zł

* insulated building

The size of a free-standing tray Cena netto VAT Cena brutto
200 l 1.609,76 zł 370,24zł 1.980,00 zł
330 l 1.691,06 zł 388,94 zł 2.080,00 zł
440 l 1.878,05 zł 431,95 zł 2.310,00 zł
660 l 2.268,29zł 521,71 zł 2.790,00 zł
820 l 2.626,02 zł 603,98 zł 3,230,00 zł
1200 l 3.211,38 zł 738,62 zł 3.950,00 zł
2100 l 4.959,35 zł 1.140,65 zł 6.100,00 zł

Technical parameters

SlimKo Plus pellet boiler with a free-standing container
Technical parameters of the SlimKo Plus 12-30 kW boiler
Boiler type kW 12 16 20 25 30
Boiler power kW 12 16 20 25 30
Burner power range kW 3,6-12 4,8-16 6-20 7,2-25 9-30
Hopper capacity l container size to choose from the container offer KOTŁOBOX
Weight of the set without water kg 220 225 270 275 340
Approximate area heated building * m2 40-110 110-160 160-200 200-240 240-300
Approximate area heated building ** m2 80-150 150-200 200-260 260-320 320-400
Boiler water capacity l 43 43 67 67 80
Fuel Pellets 6 mm, fraction granules, calorific value> 17 MJ / kg. Fuel grade C1
Maximum water temperature °C 85
Minimum water temperature °C 50/60
Length of burning dni 2-5
Dimensions of the flue section ϕ 160
Power consumption – work min.(230V/50Hz) W 60 57,6 57,9
Power consumption – work max. (230V/50Hz) W 78,1 83,6 77,6 82,8 93
Power consumption – start (230V/50Hz) W 367
Igniter power W 300
Connection ports 4 x 1” GW (2 x supply, 2 x return)

* for older buildings with inferior thermal insulation 100W/m2
** for modern buildings with better insulation of 75W/m2
(the values listed in the table are approximate and do not take into account the specific features of the facility)



SlimKo Plus pellet boiler with a free-standing container

pellet boiler


SlimKo Plus
j.m 12 kW 16 kW 20 kW 25 kW 30 kW
A mm 645 645 750 750 835
B mm 560 560 685 685 754
C mm 785 785 785 785 785
D mm 1100 1100 1100 1100 1100
E mm 440 440 508 508 590
a ø 1″ 1″ 1″ 1″ 1″
b ø 160 160 160 160 160


container j.m 200 l 330 l 440 l 660 l 820 l 1200 l
F mm 580 700 900 900 900 1100
G mm 580 700 700 900 900 1100
H mm 1300 1510 1510 1510 1710 1710


SlimKo Plus pellet boiler with a free-standing container

ecoMAX 860P

Wyswietlacz MK2 bez tla

ecoMAX 860P3-PE is the latest configuration of the PLUM controller. It is characterized by a clear, easy-to-use panel with a large display, user-friendly menu, and no need to set operating parameters of the installation. The controller consists of two parts: the module and the panel. Both devices are made of high quality, which means failure-free controller for many years.

The driver supports:

  • boiler pump, mixer pump, DHW pump, circulation pump and a shunt pump
  • mixing valve actuator
  • dedicated and binary room regulators
  • work with the heat buffer
  • burner operation with sensors
  • an attractive display on which information is displayed in the form of legible icons
  • comfortable on-line control of the boiler operation via the Internet

Additional modules enable the expansion of heating systems with additional circuits (module B – another two circuits; module C – another two circuits). Moreover, it is possible to cooperate with the Lambda probe module (ecoLAMBDA). The controller uses an intelligent menu system. The system makes unconnected elements inactive (invisible). This solution enables easy and comfortable operation.

Additional equipment

Wired touch room regulator ecoSTER Touch

sterownik s control touch 2ecoSTER TOUCH ensures thermal comfort in rooms thanks to digital communication only with ecoMAX series regulators. The device has a modern design and a large, easy to read, graphic touch display with a color menu. ecoSTER TOUCH means for the user:

  • programmable room thermostat function
  • simple and effective way to control the temperature in up to 3 rooms
  • setting a schedule of day and night temperatures
  • regulation and preview of all boiler functions
  • remote viewing of the boiler control panel screen or other room panels
  • selection of different operating modes
  • providing information on alarms
  • providing information about the fuel level in the container
  • the function of simultaneous updating of ecoSTER software, the panel and the controller module via a microSD card

Wireless two-way room thermostat eSTER x40eSTER x40 w perspektywie pellasx 1

eSTER_x40 is a battery-operated, wireless room thermostat. By connecting with the S.Control controller, it allows you to control the parameters and operating modes of the controller, maintaining the set room temperature.


  • Simple pairing with other devices
  • Possibility to place several thermostats in one building, integrated with one regulator
  • Long operation time of the thermostat with the use of the battery optimization system
  • Durable capacitive buttons
  • High operational stability thanks to constant monitoring of the connection quality – work on many channels
  • Savings in fuel consumption
  • LBS system – minimizes interference with other devices
  • Encrypted transmission – data security
  • Adaptive control of the set temperature in heating circuits
  • Battery discharge indicator
  • Ease of setup
  • Parental lock

Wireless room panel with a thermostat function – eSTER x80

Room control eSTER_x80 Room Control RADIO TOUCH is a wireless remote control panel of the burner with the function of an electric room thermostat. One of its greatest benefits is the ability to conveniently operate the boiler functions from the level of living quarters.


  • use with PLUM regulators from the ecoMAX, ecoVENT, ecoTRONIC series with an external ISM_xSMART module connected
  • regulation of the set room temperature
  • work in the following modes: Economy, Comfort, Leaving the house, Airing, Party, Vacation, Anti-freeze, Hotel mode and work with a time schedule
  • wired or wireless connection to the controller
  • can be used in any room without the use of additional wires mounted in the walls
  • any transfer of the thermostat to other rooms, depending on the user’s needs, to regulate the set temperature
  • modern design
  • convenient operation by using a touch panel and a rotating color graphic menu
  • software update via a microSDHC card and an optional microUSB OTG socket installed in the housing for cooperation with external memory.

Module for ecoLAMBDA pellet regulators

ecoLAMBDA plum modulecoLAMBDA is a modern electronic device designed to measure and regulate the oxygen content in the exhaust gas. The ecoLAMBDA module is equipped with a new generation communication interface through which the measurement results from the module are sent to the regulator. The effect of this is to ensure the optimization of the combustion process.

  • precise measurement of the oxygen content in the exhaust gas
  • optimization of the combustion process
  • reduction of carbon monoxide emissions




B / C module expanding with additional heating circuits

modul c 1 e1559831426597

  • Support for two additional heating circuits equipped with mixing valves;
  • Configurable output to support DHW circulation or reserve boiler or alarm signaling;
  • Possibility to connect an additional room thermostat;
  • Possibility to connect an additional feeder (e.g. from a silo to a tank).


SlimKo Plus pellet boiler with a free-standing container


SlimKo Plus pellet boiler with a free-standing container

1. Boiler in a closed system with a 4-way mixing valve
SlimKo instalacja w ukladzie zamknietym z zaworem mieszajacym 4 drogowym
2. The boiler in an open system with a 4-way mixing valve
SlimKo instalacja w ukladzie otwartym z zaworem mieszajacym 4 drogowym
3. Boiler in a closed system with a temperature valve ATV 55 *
SlimKo instalacja w ukladzie zamknietym z zaworem temperaturowym
4. Boiler in an open system with a temperature valve ATV 55 *
SlimKo instalacja w ukladzie otwartym z zaworem temperaturowym
5. Boiler in a system with a heat buffer
SlimKo instalacja w ukladzie zamknietym z buforem ciepla
6. Boiler in a closed system with a hydraulic coupler
SlimKo instalacja w ukladzie zamknietym ze sprzeglem hydraulicznym