Vitocal 350-A

A powerful air-source heat pump that is ideal for modernisations

Suitable for indoor or outdoor installation, the Vitocal 350-A is ideal for modernisation projects. It can be used in older systems with radiators and it supports cascade function for up to five air source heat pumps.

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  • Designed for
  • Air source
    Heat pump
  • Detached and
  • Up to
    18.5 kW
  • Energy efficiency
  • Smart home
  • Made in
  • Air/water heat pump for heating with installation inside or outside
  • Efficient defrosting through circut reversal
  • Energy efficiency class*: A++
  • Low operating noise through radial fan and reduced fan speed during night operation

Key Benefits

Heat pump control unit for remote control operation and monitoring. Top technology for top performance

The Vitocal 350-A is the first air/water heat pump with digital scroll technology and an electronic bi-flow expansion valve. This means it achieves an extremely high Coefficient of Performance of 3.5 (air 2°C / water 35°C) and therefore high seasonal performance factors too. 

What's more, it accounts for the particularly reliable heat supply of the Vitocal 350-A, as well as providing significantly lower running costs.

Solar power reduces running costs

The Vitocal 350-A air source heat pump is designed to catch the eye. It is installed in the garden and utilises the free heat available in the ambient air. The appliance is specially designed for modernising detached houses.The Vitocal 350-A is very quiet, even in standard mode. At night the fan noise is further reduced by a low speed setting. Power from a photovoltaic system on site can be used to run its electrical components, thus reducing the already low operating costs.

Operating convenience

Clear, comfortable, intelligent: The Vitotronic offers perfect functions for fast and exact control of every heating system.


Control Vitotronic 200 - Can also be operated via app via a smartphone at any time.

Vitoconnect 100 creates the connection

The Vitoconnect 100 interface is required to operate via the app. Retrofitting of earlier heat pumps of the Vitocal series (from 2010 onwards) is possible at any time.

ViCare App

The ViCare app allows the user to control their heating system via a smartphone. The operating status can be viewed at any time and, in the event of a fault, contact can be made quickly and easily with the installation company previously registered in the app.

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.

RCD: Always as much heat as you need

RCD stands for Refrigerant Cycle Diagnostic system. This is responsible for permanently monitoring the heat demand and the output made available by the Vitocal 350-A. It uses this information to match the two and can therefore achieve the highest level of efficiency at every operating point

Not only quiet at night

Particularly quiet operation is ensured by a radial fan with variable speed control and a reduced fan speed for night operation.

Everything you need

Every household has different heat demands and the conditions for installing a heat pump vary. The range of accessories for the Vitocal 350-A is suitably flexible and comprehensive. Subject to demand, the heat pump can be supplied fully equipped. This means the heating circuit pump, expansion vessel and safety equipment have already been fully fitted. Even the modular electric instantaneous heater can be easily integrated. In conclusion, Viessmann has the complete product range to meet the demands of any installation you require – inside or out.

Monitor and control from wherever you are

With the new control unit in the Vitocal 350-A, you can simply connect your heat pump to the Vitocom 100. This gives you the option of conveniently operating your heating system via your mobile phone if you wish.

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Product Data


The Vitoconnect 100 is a WiFi interface to establishes the connection allowing you to remotely operate your heating system by app, as well as supporting remote maintenance via Vitoguide.

ViCare app

With the new ViCare app, operating your heating system has become even easier and more intuitive. You can adjust heating times to suit your individual requirements using the integral wizard and see cost savings displayed instantly.

Heat pumps

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