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Traditional solid fuel boiler

Feniks UNI

Efficient traditional solid fuel boiler with lower combustion of hard coal. It operates without electric power, meets Class 5 and Ecodesign requirements, and is available in a power range from 10 to 24 kW.

Boiler power10-24 kW
Heating area50-280 m²
Combustion typelower combustion
Fuelhard coal
SteelP265GH 6 mm
Warranty5 years

Product description

Feniks UNI is a traditional solid fuel boiler with lower combustion, designed to operate without electric power.

Feniks UNI traditional solid fuel boilers are efficient heating units designed to operate without electric power. They use lower combustion technology for hard coal, making them suitable for installations where simple operation, durability and independence from electronics are important.

The boiler is made of certified P265GH boiler steel with a thickness of 6 mm. The solid construction, fillet welding and resistance to high temperature contribute to the durability of the heat exchanger and safe operation over many heating seasons.

The construction includes a tubular heat exchanger, ceramic deflectors and a draught regulator. This solution helps stabilise the combustion process, improves the efficiency of the unit and allows economical use of fuel.

Feniks UNI is equipped with a movable cast iron grate, which makes ash removal easier without the need to extinguish the boiler. The unit operates using natural air draught, so it does not require external electric power for basic operation.

The boiler meets Class 5 and Ecodesign requirements and must work with an accumulation tank, or buffer tank, which stores excess heat energy for later use.

Technical data

The most important parameters of the Feniks UNI boiler in a simple, readable layout.

Power range10-24 kW
Heating area50-280 m²
Main fuelhard coal
Combustion typelower combustion
Boiler operationwithout electric power, based on natural air draught
Construction materialcertified P265GH boiler steel, 6 mm thick
Heat exchangertubular heat exchanger with ceramic deflectors
Gratemovable cast iron grate for easier ash removal
Controlmechanical regulation with a draught regulator
Emission standardPN-EN 303-5:2012, Class 5
Ecodesigncompliant with Directive 2009/125/EC
Flue gas outletrear of the boiler, flue connection Ø160 mm
Return connectionrear of the boiler
Supply connectiontop of the boiler
Door openingleft or right opening, selectable
Buffer tankoperation with an accumulation tank is required
Warranty5 years for heat exchanger tightness

Boiler power selection

Approximate power selection for the Feniks UNI boiler based on the heated area. The final selection should be confirmed according to the building insulation, installation type and heat demand.

Nominal powerHeated areaTypical use
10 kW50-120 m²small and medium-sized single-family houses
13 kW90-150 m²single-family houses with standard heat demand
18 kW150-220 m²larger houses and utility buildings
24 kW160-280 m²larger buildings and installations with higher heat demand

The values above are approximate. The Feniks UNI boiler requires operation with an accumulation tank, also known as a buffer tank.

Standard equipment

  • Feniks UNI boiler
  • draught regulator
  • movable cast iron grate
  • ceramic deflectors in the combustion chamber
  • set of cleaning tools
  • documentation and CE, Class 5 and Ecodesign certificates

Features and benefits

  • operation without electric power
  • lower combustion of hard coal
  • certified P265GH boiler steel, 6 mm thick
  • high-efficiency tubular heat exchanger
  • movable cast iron grate for easier ash removal
  • draught regulator for mechanical air control
  • ceramic panels stabilising the combustion process
  • 5-year warranty for heat exchanger tightness

Need help choosing the right boiler?

We will help you choose the right Feniks UNI boiler output, discuss the buffer tank installation requirements and advise which variant will work best for your building.

Contact 501 735 551

Have the approximate building area ready. We will discuss the rest during the call.

Call us