Vitocal 350‑A

Viessmann Heat Pumps
Vitocal 350-A
Air-Source Heat Pumps

Vitocal 350-A

  • Rated heating output: 12.7 to 20.6 kW
  • Flow temperature up to 65 °C
  • Ideal for modernisation
  • Low operating noise

Vitocal 350-A

The Vitocal 350-A air source heat pump with a rated heating output from 12.7 to 20.6 kW is particularly suitable for modernisation projects. Thanks to enhanced vapour injection in the compression process (EVI cycle), flow temperatures as high as 65 °C can be achieved –– even at wintry outside temperatures. This means the Vitocal 350-A is also highly suitable for installation in older heating systems with radiators. To raise efficiency, we recommend replacing individual radiators with ultra-low temperature ones.

The Vitotronic 200 control unit has an integral cascade function for up to five air source heat pumps. Heating outputs of up to 92.5 kW are therefore possible to cover high heat demands.

Vitocal 350-A

High Flow Temperature Performance

Delivers flow temperatures of up to 65 °C, making it suitable for modernisation and use with existing radiator systems.

Rated Heating Output

Provides a heating output range of 12.7 to 20.6 kW, supporting both space heating and DHW applications.

High Energy Efficiency

Achieves a coefficient of performance (COP) of up to 4.0 (A7/W35), ensuring low operating costs and efficient operation.

Low Noise Operation

Features a radial fan, sound-optimised design, and night mode, ensuring quiet operation suitable for residential installations.

Flexible Installation Options

Designed for indoor and outdoor installation, providing flexibility for different project requirements.

Integrated Vitotronic Control Unit

The Vitocal 350‑A is equipped with the Vitotronic control system, featuring a clear text and graphical display for precise control of heating and DHW operation.

Remote Monitoring & Telecontrol

Supports remote access via Vitocom 100 / Vitocom 300, enabling system monitoring, diagnostics, and control from external locations.

Smart Connectivity via App

When combined with Vitoconnect, the system can be operated through the ViCare app, allowing convenient control via smartphone or tablet.

Document Name Description Document Type Language Action
Technology brochure Heating with airborne and geothermal energy PDF English Download
What applications is the Vitocal 350‑A best suited for?

The Vitocal 350‑A is particularly suitable for modernisation projects, as it can deliver high flow temperatures compatible with existing radiator systems.

What is the maximum flow temperature?

The unit can achieve flow temperatures up to 65 °C, even in cold outdoor conditions, making it ideal for high-temperature heating requirements.

How energy efficient is the Vitocal 350‑A?

It offers a coefficient of performance (COP) of up to 4.0 (A7/W35), meaning it produces significantly more heat energy than the electrical energy it consumes.

Can multiple units be combined for larger buildings?

Yes. Up to five Vitocal 350‑A units can be connected in a cascade system, providing a total output of up to 92.5 kW.

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