Homeowners Professionals
Vitoradial 300-T

Oil/gas condensing boiler

Oil/gas condensing boiler with downstream Inox-Radial heat exchanger.

Rated heating output: 101 to 545 kW
Standard seasonal efficiency [to DIN]: up to 97 % (Hs) [gross cv]
Inox-Radial heat exchanger
Environmentally responsible operation
Oil/gas condensing boiler

Output range from 101 to 545 kW

Standard seasonal efficiency [to DIN]

Standard seasonal efficiency [to DIN] (fuel oil): 97 % (Hs) [gross cv]

Inox-Radial heat exchanger

Corrosion-resistant Inox-Radial heat exchanger made from stainless steel

Complete with heat exchanger pipework and pump

Matched to the heating output of the boiler

Environmentally responsible operation

Thanks to long burner runtimes and fewer switching intervals

Integral Therm-Control start-up system

For simple hydraulic connection – no return temperature raising facility or shunt pump required

No low water indicator required

This helps to save costs

Compact construction

For easy transportation and low build height – ideal for modernisation projects

Easy to use Vitotronic control unit

With colour touchscreen for excellent ease of use

Integral WiFi

For the service interface

Economical and safe operation of the heating system

Vitotronic digital control system with communication capability

Integration into building management systems

Made possible by the Vitotronic in conjunction with Vitogate 300 (accessories)

Vitocontrol control panel

Available on request

Vitoradial 300-T: efficient with condensing technology

Condensing technology with the proven Inox-Radial heat exchanger for efficient heating operation

The Vitoradial 300-T condensing boiler is particularly compact. The three-pass boiler with multi layered convection heating surfaces and Inox-Radial spiral heat exchanger installed downstream, easy to operate Vitotronic control unit with colour touchscreen and boiler door with burner plate.

High efficiency with two-stage heat recovery

The Vitoradial 300-T is an innovative combination of the Vitoplex 300 low temperature boiler with an Inox-Radial heat exchanger directly attached to the boiler for utilising condensing technology. The proven multi layered convection heating surfaces, combined with the corrosion-resistant Inox-Radial heat exchanger, enable highly efficient two-stage heat recovery. The Vitoradial 300-T is suitable for operation with all commercially available types of extra light (EL) fuel oil and natural gas.

Its compact design and low build height make the Vitoradial 300-T the ideal choice for modernisation projects.

Triplex pipes for 2.5 times larger heating surface

The multi layered convection heating surfaces of the Vitoradial 300-T are comprised of telescopically arranged steel pipes pressed into each other for ideal heat transfer. The inner pipe, with its folded linear fins, creates a heating surface 2.5 times greater than that of smooth pipes. Heat is transferred through the different gaps between the press points in such a way that the back area of the triplex pipes transfers less heat to the boiler water, as the combustion gases circulating here are no longer quite as hot. This keeps the surface temperature above the dew point, counteracting the formation of condensate and preventing corrosion damage.

Utilising condensing technology with the Inox-Radial heat exchanger

The downstream Inox-Radial heat exchanger delivers highly efficient condensing technology. It raises the efficiency level by eight percent to 97 percent (Hs) [gross cv]. This principle ensures that combustion and condensation occur in physically separate locations and the combustion gases condense without leaving any residues behind. In practice, this means standard service intervals for cleaning the combustion chamber and low maintenance costs.

The Vitoradial 300-T is available for an output range of up to 545 kW. The Inox-Radial heat exchanger is highly efficient and made from stainless steel – this eliminates the risk of corrosion caused by acidic condensate.

Vitoradial 300-T oil/gas condensing boiler with downstream Inox-Radial heat exchanger

Convenient and highly capable Vitotronic control unit

The integral Vitotronic control unit with its large colour touchscreen is easy and intuitive to use. An assistant function helps with commissioning. The boiler can be connected directly to Vitodata via the Vitocom interface. This option provides heating contractors with additional digital services to ensure fault-free system operation. The Vitosoft 300 service tool communicates directly via WiFi. Energy consumption can be clearly visualised on the control unit's energy cockpit.

Product details

Output (kW)

101 to 545 kW. Type VR3, output stages: 101 / 129 / 157 / 201 / 263 / 335 / 425 / 545 kW

Standard seasonal efficiency [to DIN]

97 % (Hs) [gross cv]


The Vitoradial 300-T is suitable for operation with all commercially available types of extra light (EL) fuel oil and natural gas.

Application area

Oil heating in apartment buildings, large residential buildings, commercial premises and public buildings | New build and modernisation projects


Easy to operate Vitotronic control unit with colour touchscreen. Integral LAN interface for internet communication and integral WiFi for service interface.

DHW heating

Additional DHW cylinder required for a high level of DHW convenience

Additional features

Integral Therm-Control start-up system for easy hydraulic connection – no shunt pump or return temperature raising facility are required.

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