Vitocal 242-G compact ground source heat pumps with the option of linking in a solar thermal system

Take advantage of these benefits

  • Equipped as standard for connection to a solar thermal system
  • Low running costs thanks to a high COP (coefficient of performance) to EN 14511 of up to 4.5 (brine 0 °C/water 35 °C)
  • Maximum flow temperature: 60 °C
  • High level of DHW convenience through integral DHW cylinder with 220 litre capacity
  • Very quiet thanks to the sound-optimised appliance design with a sound power level of 43 dB(A) at 0/35 °C
  • Easy to use Vitotronic control unit with plain text display
  • Easy handling through small footprint, reduced height and split casing
  • Prepared for Smart Grid and utilisation of PV power generated on site
  • Instantaneous heating water heater integrated as standard
  • Optimised for the use of power generated on site by photovoltaic systems
    • Energy efficiency class* A++ / A++
    • Energy efficiency class, DHW heating: A

* Energy efficiency class as per EU Regulation No. 811/2013 for heating, average climatic conditions – low (35 °C) / medium temperature applications (55 °C)

Vitocal 242-G compact heat pump

Complete and extremely compact – the Vitocal 242-G compact heat pump is fully equipped with all of the components required for central and DHW heating. With heating outputs of between 6.1 and 10.0 kW, it is designed for use in detached houses, and flow temperatures up to 60 °C mean it can also be used with conventional radiators.

Vitocal 242-G is the attractively priced alternative to the compact appliance of the 300 series.

Equipped with a Compliant scroll compressor and a thermostatically controlled expansion valve, it achieves coefficients of performance of up to 4.5 (to EN 14511 at brine 0 °C/water 35 °C). High efficiency circulation pumps have been newly integrated into the heating and brine circuits.

Vitocal 242-G is fully prepared for solar operation. Operating the compact appliance is extremely easy thanks to the Vitotronic control unit.

Fully prepared for solar operation

With the Vitocal 242-G, the connections for a solar thermal system are already in place, with the required hydraulic connections and the control unit integrated. A 220 l solar cylinder and a solar control unit enable high solar yields to be achieved.

The powerful collectors and matching system components from Viessmann back up the heat pump – meaning in an average year, 50 to 60 percent of energy usually spent on DHW heating can be saved.

Extremely easy to operate

Like all compact appliances, the Vitocal 242-G is also equipped with the extremely user friendly Vitotronic control unit. If in doubt, help is available at the push of a button. The graphic interface will also display heating curves and switching times.

Particularly quiet operation

The sound-optimised appliance design makes these compact heat pumps particularly quiet so that they can even be installed close to the living space.

Heating naturally – naturally cooling as well

The compact heat pumps can provide a pleasant climate in a low energy house, even on hot summer days. The natural cooling function brings cool underground temperatures into the home. For this, the Viessmann NC-Box is required as an accessory.

Vitotronic 200 control

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 using an app via a smartphone at any time.

Vitoconnect 100 creates the connection

The Vitoconnect 100 interface is required for operation via the app. Retrofitting earlier heat pumps of the Vitocal series (from year of construction 2010) is possible at any time.

Vitoconnect 100
ViCare App & Vitotrol Plus App

ViCare App

The ViCare app enables system users to control their heating system via smartphone. The operating status can be viewed at any time and the contractor whose details have been stored in the app can be contacted quickly and easily if a fault occurs.

Vitotrol Plus app

The Vitotrol Plus app enables remote control of all heating circuits in a heating system. It is used to configure operating programs, set values and time programs and display operating and consumption data. It also indicates solar yields.


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.

Product cross-section


Nominal heat output (kW)
6.1 to 10.0 kW
COP during heating operation
up to 4.3 dependent on output stage
Energy efficiency class
A ++ * according to EU Regulation No. 811/2013 heating, average climate conditions -. Low temperature application (W35)
Single family homes, new builds
Vitotronic 200 control unit with plain text graphic display, operation via Vitotrol App is possible
Water heating
Integrated 220-litre solar storage cylinder
Other features
"natural cooling" function with optional NC-Box
Produktschnitt Sole/Wasser-Wärmepumpe Vitocal 242-G


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