Vitoplex 300 - triplex pipes for large heating surface

Benefit from these advantages:

  • Low temperature oil/gas boiler, rated from 90 to 2000 kW
  • No low water indicator required up to 300 kW
  • Sizes from 620 kW with walk-on boiler cover, for easier installation and maintenance
  • Compact design for easy handling and low build height, important for modernisation projects
  • Environmentally responsible operation thanks to long burner runtimes and fewer cycle intervals

Three-pass boiler with integral start-up control

The Vitoplex 300 steel boiler is available in two versions from 90 to 2000 kW. It is the universal heating system for new build and modernisation.

The multi layered convection heating surfaces consist of telescopically arranged triplex pipes pressed into each other. The internal pipe surrounded by folded linear fins creates a heating surface 2.5 times greater than that of a smooth pipe.

The integral Therm-Control start-up system makes a separate return temperature raising facility unnecessary.

Convenient and highly capable control units

Economical operation of the heating system is ensured by the digital Vitotronic control unit.

The Vitotronic 300-K is a particularly capable version for multi boiler systems comprising up to four individual boilers with modulating boiler water temperature.

The Vitotronic 200-H regulates up to 96 additional heating circuits.

Integration into building management systems is possible. The TeleControl system with the Vitocom and Vitodata is available for remote monitoring via internet.

Low temperature oil/gas boiler Vitoplex 300

Three-pass boiler with integrated start-up circuit

As a three-pass boiler with its proven multi-shell convection heating surfaces, the Vitoplex 300 offers particularly economical, low-emission and reliable operation.

Multi-layer convection heating surfaces from triplex pipes

The multi-shell convection heating surfaces of the Vitoplex 300 consist of interlocking steel tubes that are pressed together to conduct heat. With its folded longitudinal ribs, the inner tube forms a heating surface 2.5 times larger than smooth tubes.

The heat transfer is metered in such a way, in particular by varying the spacing of the pressed sections, that the rear section of the triplex tubes, through which combustion gases that are no longer so hot flow, dissipates less heat to the boiler water. In this way, the surface temperature remains above the dew point temperature, condensation is counteracted, and corrosion damage is avoided.

Convenient and powerful Vitotronic control unit with color touch display

Convenient and powerful Vitotronic control unit

The Vitotronic control unit with large color touch display allows quick commissioning using the assistance function as well as simple operation. The boiler can be connected directly to the internet via the integrated LAN interface for remote monitoring. The Vitosoft 300 service tool communicates directly via WLAN. Energy consumption can be visualized transparently via the control unit's energy cockpit.

Vitoplex 300 | 90 to 2000 kW


Output (kW)
90 to 2000 kW
Standard seasonal efficiency [to DIN]
for operation with fuel oil: 89 % (Hs) [gross cv] / 95 % (Hi) [net cv]
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Natural gas E and LL. All commercially available EL-type fuel oils can be used. Suitable burners for the Vitoplex 300 300 kW and above available from Weishaupt and ELCO.
Application range
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Apartment buildings, large residential buildings, commerce, municipal offices, new build and modernisation projects
Einfaches RGB
Easy-to-use Vitotronic control unit with plain text and graphic display; may be operated using the Vitotrol app depending on the type of control unit
DHW heating
Additional DHW cylinder(s) required, resulting in a high level of DHW convenience
Additional features
The integral Therm-Control start-up system replaces the shunt pump or constant return temperature raising facility, thereby saving installation time and costs.


A perfect match – System technology

"The whole is greater than the sum of its parts". Following this philosophy, Viessmann supplies more than high quality, reliable and effective heating components. In fact, all products are part of a matching total concept, where all components complement one another. After all, only perfect interaction between all system components can draw out the maximum potential of our innovative leading technology.

Viessmann system technology incorporates everything you need for a reliable and economical heating system: From the Vitotronic control unit with wireless remote control, powerful Vitocell DHW cylinders for the highest DHW convenience, right up to high grade solar thermal systems for cost effective central heating backup.