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Modern DEFRO gas boilers – condensing, dual-function and single-function for every home

Polish product, manufactured within the European Union.

 

Choosing the right heat source, such as a gas boiler, is one of the most important decisions when building or modernising a house. A properly selected boiler will ensure the right level of thermal comfort, savings, reliability and ecological performance. Energy efficiency standards are very high, which is why it is worth choosing proven and dependable heating devices that can meet these requirements.

Our devices combine user comfort with high efficiency and care for the environment. All this is possible thanks to the modern technological solutions we have implemented in our heating equipment. Whether you want to heat a single-family home, an apartment or a service building, in our range of gas boilers you will find a solution tailored to your needs.

The devices we create are adapted to Polish climatic conditions as well as user expectations. DEFRO gas boilers are designed and manufactured in Poland. Thanks to this, we are able to ensure quick access to spare parts as well as to device servicing.

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DCG COMFORT 25 – 1 F

Type:
1 F - single-function
Boiler power:
2,5 - 24 kW
Maximum useful thermal efficiency (50/30°C):
107,4 %
Degree of electrical protection:
IPX4D
Boiler sound intensity level:
48 dB
Guarantee:
5 years
Optional equipment - for an additional fee:
i-2 Plus controller, i-3 Plus controller, Wifi-OT controller, ST-292 v3 controller, ST-292 v2 controller
Additional information:
Read more

DCG COMFORT 25 – 1 F – GLASS

Type: 1 F - single-function
Boiler power: 2,5 - 24 kW
Maximum useful thermal efficiency (50/30°C): 107,4 %
Degree of electrical protection: IPX4D
Boiler sound intensity level: 48 dB
Guarantee: 5 years
Optional equipment - for an additional fee: i-2 Plus controller, i-3 Plus controller, Wifi-OT controller, ST-292 v3 controller, ST-292 v2 controller
Additional information: Control via the Internet is possible after purchasing an internet module with OPEN THERM communication, e.g. WIFI OT
Read more

DCG COMFORT 25 – 1 F – WHITE

Type: 1 F - single-function
Boiler power: 2,5 - 24 kW
Maximum useful thermal efficiency (50/30°C): 107,4 %
Degree of electrical protection: IPX4D
Boiler sound intensity level: 48 dB
Guarantee: 5 years
Optional equipment - for an additional fee: i-2 Plus controller, i-3 Plus controller, Wifi-OT controller, ST-292 v3 controller, ST-292 v2 controller
Additional information: Control via the Internet is possible after purchasing an internet module with OPEN THERM communication, e.g. WIFI OT
Read more

DCG COMFORT 25 – 2 F – GLASS

Type: 2 F - dual-function
Boiler power: 2,5 - 24 kW
Maximum useful thermal efficiency (50/30°C): 107,4 %
Degree of electrical protection: IPX4D
Boiler sound intensity level: 48 dB
Guarantee: 5 years
Optional equipment - for an additional fee: i-2 Plus controller, i-3 Plus controller, Wifi-OT controller, ST-292 v3 controller, ST-292 v2 controller
Additional information: Control via the Internet is possible after purchasing an internet module with OPEN THERM communication, e.g. WIFI OT
Read more

DCG COMFORT 25 – 2 F – WHITE

Type: 2 F - dual-function
Boiler power: 2,5 - 24 kW
Maximum useful thermal efficiency (50/30°C): 107,4 %
Degree of electrical protection: IPX4D
Boiler sound intensity level: 48 dB
Guarantee: 5 years
Optional equipment - for an additional fee: i-2 Plus controller, i-3 Plus controller, Wifi-OT controller, ST-292 v3 controller, ST-292 v2 controller
Additional information: Control via the Internet is possible after purchasing an internet module with OPEN THERM communication, e.g. WIFI OT
Read more

DCG SMART – 1F

Type: 1 F - single-function
Boiler power: 20, 24 , 32kW
Maximum useful thermal efficiency (50/30°C): 107,4 %
Degree of electrical protection: IPX4D
Boiler sound intensity level: 20 kW - 47 dB 24 kW - 48 dB 32 kW - 49 dB
Guarantee: 5 years
Optional equipment - for an additional fee: i-2 Plus controller, i-3 Plus controller, Wifi-OT controller, ST-292 v3 controller, ST-292 v2 controller
Additional information: Control via the Internet is possible after purchasing an internet module with OPEN THERM communication, e.g. WIFI OT
Read more

DCG SMART – 2F

Type: 2 F - dual-function
Boiler power: 20, 24 , 32kW
Maximum useful thermal efficiency (50/30°C): 107,4 %
Degree of electrical protection: IPX4D
Boiler sound intensity level: 20 kW - 47 dB 24 kW - 48 dB 32 kW - 49 dB
Guarantee: 5 years
Optional equipment - for an additional fee: i-2 Plus controller, i-3 Plus controller, Wifi-OT controller, ST-292 v3 controller, ST-292 v2 controller
Additional information: Control via the Internet is possible after purchasing an internet module with OPEN THERM communication, e.g. WIFI OT
Read more

Why should you choose modern condensing gas boilers?

Condensing gas boilers are currently among the most efficient heat sources. This is possible thanks to the additional recovery of heat from exhaust gases, which significantly reduces gas consumption—and in turn lowers heating bills. In our offer, you will find devices that not only meet strict energy-efficiency standards but even exceed them. Gas boilers also provide maximum thermal comfort, quiet operation, and increased durability of the entire heating system. By choosing Defro boilers, you gain the most modern solutions on the market and invest in the future of your home and family.

Single-function or dual-function gas boiler — which one should you choose?

Our product range includes a wide variety of heating devices, including single-function and dual-function gas boilers. Each type serves different needs, which is why our advisors help select the best solution for your home. Important factors include the number of residents, room layout, the number of water draw-off points, and the expected hot-water demand. A dual-function gas boiler provides heating (CH) and heats domestic hot water instantly, without the need for a separate tank. A single-function boiler only handles central heating, but the system can easily be expanded with an additional hot-water storage tank. A single-function boiler works best in larger houses with more residents, two bathrooms, and multiple hot-water points. A dual-function boiler is ideal for smaller homes where hot-water consumption is significantly lower.

What should you know about gas boilers with open or closed combustion chambers?

In a gas boiler, the type of combustion chamber greatly affects safety and installation options. Our offer includes gas boilers with both open and closed combustion chambers. Closed-chamber gas boilers draw air from outside the building and are recommended especially for homes with modern ventilation systems. Open-chamber boilers should be installed only in properly prepared rooms with adequate airflow. Both solutions meet current standards and work well in different environments—but our specialists will help you choose the one that best fits your needs.

DEFRO gas boilers — reliability and quality straight from Poland

Defro gas boilers represent quality trusted by thousands of users in Poland and abroad. Choosing gas boilers designed and manufactured in Poland means supporting the development of Polish heating technology. DEFRO designs boilers based on the needs of local users, adapting them to Polish climate conditions and the strictest ecological requirements. When you buy a boiler from a Polish manufacturer, you can count on quality, quick support, reliable service, and easy access to spare parts.

Why is power modulation one of the most important parameters of a gas boiler?

Modern technology influences nearly every aspect of life—including gas boilers. Power modulation is the ability of the boiler to adjust its output to the current heating demand. The wider the modulation range, the better for the user. Modern gas boilers can modulate their power output so the system precisely adjusts its operation to the building’s actual heat requirements at any given moment.

Installation and servicing of gas boilers — why is it so important?

Proper installation is essential, especially for condensing gas boilers, where many factors affect efficiency and safety. Defro works only with professional and certified installers, so you can be sure the installation meets all our guidelines and current regulations. It is also important to service your boiler annually to ensure everything functions correctly. Proper boiler operation means safety, lower operating costs, and longer system lifespan.
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Have more questions?

Would you like to ask about a discount?

Do you need device selection?

If you want to install a new heat source, it is worth paying attention to DEFRO devices, a Polish manufacturer with many years of experience in the heating industry. Our specialists will help you choose the right boiler and its power, and distributors and installers will take care of the assembly and commissioning, and all you need to do is enjoy the warmth and comfort. The distribution network of our products is divided into regions for which managers and salespeople are responsible.

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