Compact Size and High Power The compact size of the boiler allows for installation in small boiler rooms while still providing high heating power.
Meets 5th Class Emission Standards The boiler is certified as 5th class by an accredited laboratory, enabling eligibility for funding under programs for purchasing eco-friendly heat sources.
Self-Cleaning System The automatic cleaning process of the heat exchanger has been optimized to maximize user comfort.
Boiler
The boiler body is made of P265GH steel plate, designed for use in high-temperature devices. The placement of channel pipes allows for automatic cleaning by springs located inside, which also serve as flue gas swirlers. Ash and soot are removed through the door in the combustion chamber.
Controller
The microprocessor controller, positioned at the top front of the boiler, allows programming of operating temperatures. It also monitors boiler operation and provides emergency shutdown if the water temperature exceeds 90ºC.
Mini Boiler Room Integrated into the Boiler
Inside the boiler, there are additional components, including central heating (CH) and domestic hot water (DHW) pumps, an expansion vessel, a mixing valve, and a combustion chamber pressure control system.

| Parameter | Unit | SPARK EVO | |||||
|---|---|---|---|---|---|---|---|
| 12 mini | 14 | 18 | 22 | 29 | |||
| Dimensions | D | [mm] | ∅ 80 | ∅ 100 | |||
| L1 | 125 | ||||||
| L2 | 153 | ||||||
| L3 | 356 | ||||||
| L4 | 142 | ||||||
| L5 | 239 | ||||||
| L6 | 379 | ||||||
| L | 850 | ||||||
| H | 1205 | 1425 | |||||
| H1 | 856 | 881 | |||||
| H2 | 163 | ||||||
| H3 | 171 | ||||||
| H4 | 952 | ||||||
| S | 621 | 616 | |||||
| Primary Fuel | [-] | Wood Pellets | |||||
| Heat Output Range | [kW] | 3.9 - 13.2 | 4.2 - 14.5 | 4.2 - 18.0 | 4.2 - 22.0 | 4.2 - 27.2 | |
| Heated Space Volume | [m3] | 475 | 550 | 725 | 875 | 1150 | |
| Heated Space Area | [m2] | 190 | 220 | 290 | 350 | 460 | |
| Hopper Capacity | [L] | 83 | 140 | ||||
| Boiler Water Capacity | [L] | 85 | 100 | ||||
| Maximum Operating Pressure | [bar] | 3 | |||||
| Required Minimum Chimney Draft | [mbar] | 0.1 | 0.15 | ||||
| Flue Gas Temperature | Nominal Power | [°C] | 97 | 86 | 97.4 | 110 | 126.5 |
| Minimum Power | 65.5 | ||||||
| Flue Gas Mass Flow | Nominal Power | [g/s] | 8.5 | 8.2 | 11 | 14.2 | 18.4 |
| Minimum Power | 4.9 | 7.7 | |||||
| Fuel Consumption at Nominal Power (Calorific Value: 17 MJ/kg) | [kg/h] | 2.94 | 3.13 | 3.96 | 4.91 | 6.15 | |
| Water Flow Resistance at Nominal Power | Δt = 10K | [mbar] | 330 | 320 | 172 | 10 | 109 |
| Δt = 20K | 416 | 540 | 414 | 385 | 260 | ||
| Water Temperature Range (Min / Max) | [°C] | 57/80 | |||||
| Electrical Supply (230V - 50Hz, / 400V - 50Hz) | [V] | 1L - N 230V | |||||
| Electrical Power | [W] | 396 | 1050 | ||||
| Standby Power | 3 | ||||||
| Power Consumption at 30% Load | 70 | ||||||
| Power Consumption at 100% Load | 118 | ||||||
| Noise Level | [dB] | <65 | |||||
| Boiler Weight Without Water | [kg] | 220 | 274 | ||||
| Supply and Return Pipe Diameter | [-] | GZ 3/4” | |||||
| Thermal Efficiency According to PN-EN 303-5:2021-09 (Nominal – Minimum Power) | [%] | 94.4-89.2 | 95.7-90.0 | 94.8-90.0 | 93.8-90.0 | 92.5-90.0 | |
| Energy Class | [-] | A+ | |||||
| Controller / Fan | [-] | YES / YES | |||||
| Boiler Operation in Positive Pressure [+] / Negative Pressure [–] at Outlet | [-] | [–] | |||||
| Warranty | [-] | 5 years for heat exchanger tightness, 2 years for controller and components | |||||
| Heat Exchanger Material | [-] | P265GH Steel PN-EN 10028 | |||||
| Temperature Setting Range on Controller | [°C] | 40 / 80 | |||||
| Class | A+ |
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