Vitoplex 300

Viessmann Fuel Oil Boiler
Vitoplex 300
Low Temperature Oil/Gas Boiler

Vitoplex 300

Low temperature oil/gas boiler with multi layered convection heating surfaces made from triplex pipes.

  • Rated heating output: 405 to 2000 kW
  • Standard seasonal efficiency [to DIN] using fuel oil: 90 %
  • Integral Therm-Control start-up system
  • Multi layered convection heating surfaces

Vitoplex 300

The Vitoplex 300 is a high‑capacity low‑temperature oil/gas boiler designed for commercial buildings, industrial facilities, district heating systems, and large residential projects. With a rated heating output from 405 to 2,000 kW, it delivers reliable, economical heat generation for demanding applications.
Its robust three‑pass boiler design, intelligent hydraulic integration via Therm‑Control, and advanced Vitotronic digital control ensure efficient operation, low emissions, and seamless integration into modern building automation systems.

Vitoplex 300

High Seasonal Efficiency (DIN)

Achieves a standard seasonal efficiency of up to 90% (Hs) when operated with fuel oil, ensuring economical operation.

Multi‑Layered Convection Heating Surfaces

Designed for high operational reliability and long service life, even under continuous load conditions.

Integral Therm‑Control Start‑Up System

Replaces the need for: shunt pumps constant return temperature raising significantly reducing installation time and system costs.

Optional Condensing Technology

With an optional stainless steel flue gas/water heat exchanger, the boiler can utilise condensing technology for higher seasonal efficiency.

Easy‑to‑Use Vitotronic Control Unit

Equipped with a colour touchscreen, providing intuitive operation, clear system overview, and guided parameter setting.

Economical and Safe Operation

The Vitotronic digital control system ensures precise temperature control, safety monitoring, and efficient load management.

Standardised LON Bus Interface

Allows full integration into building management systems (BMS) for:

Central monitoring
Fault reporting
Energy optimisation

Designed for Complex Heating Systems

Suitable for multi‑boiler plants, district heating applications, and large technical installations.

Document Name Description Document Type Language Action
Technical Data Manual Vitoplex 300 PDF English Download
Why is the Vitoplex 300 suitable for large boiler rooms?

Its high output range, walk‑on boiler cover, and service‑friendly design make it ideal for large central heating plants.

How does Therm‑Control simplify hydraulic integration?

Therm‑Control eliminates the need for return temperature boosting, reducing system complexity and installation costs.

Who typically specifies the Vitoplex 300?

It is commonly selected by:

Consulting engineers
Facility managers
Industrial operators
District heating providers

What is the main benefit of choosing the Vitoplex 300?

It combines high output, robust construction, simplified hydraulics, and advanced digital control in one reliable heating solution.

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Vitoplex 300
Fuel Oil Boiler

Vitoplex 300

Low-temperature oil/gas boiler with multilayer convective heating surfaces made of three-layer pipes. Rated heat output: 405 – 2000 kW

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