Atmos | SKU: 01.05.25

Atmos GS 25 25 kW Wood Gasification Boiler

Name: Atmos GS 25 25 kW Wood Gasification Boiler
Brand: Atmos
SKU: 01.05.25
Price: 5054.00 EUR
Availability: InStock

25 kW nominal output for classic water-based wood heating systems

Designed for log lengths up to 530 mm

Robust wood gasification technology with large loading chamber and ceramic combustion chamber

The Atmos GS 25 is a hand-fed wood gasification boiler with a nominal output of 25 kW for water-based wood heating systems in private residential buildings. It combines a large loading chamber for logs up to 530 mm with robust gasification technology, a ceramic combustion chamber, and classic system integration with a buffer tank.

5.054,00 €

vAT included. Shipment will be charged at checkout.

Highlights

Rated Output	25 kW
Energy Efficiency Class	A+
Max. Log Length	530 mm
Boiler Class	5
Max. Operating Pressure	2,5 bar

Standard with induced draft fan for batch combustion operation

Ceramic combustion chamber for temperature-stable combustion

Large fuel shaft with approx. 120 liters volume

Automatic shut-off for fan and charging pump after combustion

Integrated safety heat exchanger for thermal protection

Description

Product Overview & Application

The Atmos GS 25 wood gasification boiler is a manually fed hot water heating boiler for logs, designed for heating single-family homes and similar properties. This model is part of the ATMOS GS series, operates with an exhaust fan, and is intended for systems where a classic wood heating system with a large fuel chamber, robust construction, and straightforward technology is required.

Technology & Features

The boiler operates on the wood gasification principle with a ceramic-lined combustion chamber and an exhaust fan. Features include a large fuel shaft, an electromechanical controller with boiler and flue gas thermostats, a start-up flap, an integrated safety heat exchanger to prevent overheating, and a shutdown logic for the fan and charging pump after the burn cycle.

Everyday Advantages

The design accommodates long logs up to 530 mm, making reloading easier in daily use and reducing preparation effort compared to shorter log lengths. The ceramic combustion chamber, induced draft fan, and clear control structure support stable combustion, making the GS 25 a straightforward, robust solution for users who consciously choose to heat with logs.

System Integration & Compatibility

The Atmos GS 25 is designed as a full-load boiler for integration into a water-based heating system. For operation, the series requires a sufficiently warm return flow temperature and is optimized for use with a buffer tank; the documentation for the GS 25 specifies a minimum buffer volume of 500 liters.

Technical Data at a Glance

The key verified core data of the Atmos GS 25 in a compact overview.

Nominal Output	25 kW
Fuel	Wood
Energy Efficiency Class	A+
Max. Operating Pressure	2.5 bar
Max. Log Length	530 mm
Boiler Class	5
Draft Requirement	23 Pa
Flue Pipe Connection	150/152 mm
Height	1260 mm
Width	680 mm
Depth	1045 mm
Voltage / Frequency	230 V / 50 Hz
Power Consumption	50 W

Installation

Installation must be carried out in a suitable boiler room with adequate combustion air supply; installation in living spaces is not permitted. The system requires a suitable chimney, professional hydraulic integration with return temperature boosting, and coordinated integration of a buffer tank.

Notes

For intended operation, dry logs with a residual moisture content of approximately 12 to 20% must be used. According to the documentation, a minimum return temperature of 65 °C must be maintained during operation; the recommended boiler flow temperature is 80 to 90 °C.

Scope of Delivery

Atmos GS 25 Wood Gasification Boiler
Steel brush with accessories
Poker
Fill valve
Operating and maintenance manual
Honeywell FR 124 draft regulator
Ash pan

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