FIREWOOD BOILER
15 – 20 kW
Integrated particle separator
(electrostatic precipitator)
available as an option

Firewood boiler
NEW! S2 Turbo
The S2 Turbo firewood boiler combines the latest technology with the strengths of tried and tested systems, providing reliable heat at the highest level. The new LTC 5000 control system with 7” glass touch display offers even more options when it comes to controlling the boiler. The swivelling flue pipe connection makes adapting to different types of installation possible, considerably facilitating installation. Optionally, an integrated particle separator ensures even lower emissions and fulfils the highest requirements for environmental friendliness. Proven features such as efficient carbonisation gas extraction, the speed-controlled induced draught fan, high efficiency, long refilling intervals and low power consumption make the S2 Turbo a solution that is as economical as it is practical. Heating with firewood can be so convenient!
Froling offers a flexible solution for people who may want to use pellets in future: the S2 Turbo comes with a pellet flange as standard, which means that the pellet unit can be retrofitted at any time. This is supplied fully insulated and ready to plug in.

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The latest technology

Flue pipe connection can be rotated to horizontal or vertical orientation
Speed-regulated induced draught fan
Manual/automatic WOS system (efficiency optimisation system) for optimum cleaning of the heat exchanger pipes
Large fuel loading chamber for 50 cm wood blocks (up to 56 cm)
High-temperature firebrick-lined combustion chamber (Easy to replace individual bricks)
High-quality insulation for minimal radiant heat loss
Automatic ignition with silent ceramic igniter (optional)
Lambdatronic 5000 controller with 7” glass touch display for even easier operation
Carbonisation gas extraction system prevents smoke escaping during reloading
Special automatic pre-heating with regulated air ducts
Large cleaning port door for easy ash removal and cleaning from the front
Integrated particle separator (electrostatic precipitator) available as an option
Individual controller for the heating system
Lambdatronic 5000 controller
With the new Lambdatronic 5000 boiler controller and the modern 7″ glass touch display, Fröling is moving into the future. The new design is impressive, not only for its intuitive operation but also its numerous new features. The most important
components can be freely selected in the tile overview and information and error messages can be customised. For example, the control system will inform you when the ash box needs to be emptied. This makes operating and running the system even simpler and easier to understand. The intelligent control management enables the almost unlimited integration of heating circuits, storage tanks and hot water tanks.
Advantages
- Precise combustion control by a Lambda controller using a Lambda probe
- Connection of heating circuits, water heaters and buffer storage tanks Management systems
- Integration capability for a solar panel system
- LED frame for status display with illuminated presence detection
- Simple & intuitive operation
- Various SmartHome solutions (e.g. Loxone, Modbus TCP) Remote control from the Living room (room console) or via the Internet (froeling-connect.com)



Keep track of everything with the Froling App
The Froling App allows you to check and control your Froling boiler online from
anywhere, at any time. You can read and modify the main status information and settings easily and conveniently online. You can also specify which status messages you want to be informed about via SMS or e-mail (e.g. when the ash box is to be emptied or in the event of a fault message).
The app is available in the Android Play Store and iOS App Store.
Advantages
- Simple and intuitive operation of the boiler
- Status information can be called up and changed within seconds
- Individual naming of the heating circuits
- Changes of status are notified directly to the user (e.g. via
e-mail or push notifications) - No additional hardware required (such as an Internet gateway)
Smart Home
Loxone
Combine your Froling heating system with the Loxone Miniserver and the new Froling Extension and implement individual boiler control on the basis of the single room control of the Loxone Smart Home.
Modbus
Via the Froling modbus interface, the system can be integrated
into a building management system.
Brochures / EU Label
Tecnical data
| Tecnical data - S2 Turbo | 15 | 20 |
|---|---|---|
| Nominal output | [kW] | 15 |
| Energy rating label Efficiency label (boiler + controller) | A+ | A+ |
| Power connection | [V/Hz/A] | 230V / 50Hz / fused C16A |
| Power consumption | [W] | 41 |
| Weight of boiler incl. insulation and control | [kg] | 490 |
| Dimensions of fuel loading door (width/height) | [mm] | 350 / 360 |
| Fuel loading chamber capacity | [l] | 80 |
Dimensions

| Dimensions in mm - S2 Turbo | 15 | 20 |
|---|---|---|
| L1 Length of the boiler (flue gas pipe connection at rear) | 1070 | 1070 |
| L2 Distance from the flue gas pipe top connection to the front face of the boiler | 915 | 915 |
| L3 Length, boiler | 1000 | 1000 |
| B1 Overall width of boiler incl. WOS lever | 830 | 830 |
| B2 Width of boiler | 685 | 685 |
| B3 Distance between flue gas pipe connection and side of boiler | 270 | 270 |
| B4 Distance between flow connection and side of boiler | 135 | 135 |
| B5 Distance between safety heat exchanger connection and side of boiler | 105 | 105 |
| B6 Distance between safety heat exchanger connections | 65 | 65 |
| B7 Distance between return connection and side of boiler | 485 | 485 |
| B8 Distance between drainage connection and side of boiler | 575 | 575 |
| H1 Height of boiler | 1335 | 1335 |
| H2 Height of rear connection for the flue gas pipe | 1230 | 1230 |
| H3 Height of flue gas pipe top connection | 1385 | 1385 |
| H4 Height, safety heat exchanger connection | 840 | 840 |
| H5 Height, return connection | 150 | 150 |
| H6 Height, drainage connection | 125 | 125 |
| H7 Height, flow connection | 1125 | 1125 |
| Flue gas pipe diameter | 129 | 129 |
Operating and mainentance areas

| Minimum clearances - S2 Turbo [mm] | 15 / 20 |
|---|---|
| A Clearance from front of boiler to wall | 800 |
| B Door swing area | 200 |
| C Clearance from back side to walld | 400 |
| D Clearance from side of boiler to wall | 500 (200¹) |
| E Maintenance area above the boiler² | 500 |
| Mindestabstände - S2 Dual compact [mm] | 15 / 20 |
|---|---|
| A Clearance from front of boiler to wall | 800 |
| B Clearance from boiler side with pellet unit to wall | 200 |
| B1 Clearance from boiler side without pellet unit to wall | 815 |
| C Clearance from back side to walld | 400 |
| D Clearance from side of boiler to wall | 500 (200¹) |
| E Maintenance area above the boiler² | 500 |
¹ The heat exchanger for the boiler is accessible for maintenance only from the front
² Maintenance area for removing the WOS springs upwards
Tecnical documentation
For you personally
Information & advice
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