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Vitocal 252-A

Air source heat pump

The Vitocal 252-A is a compact air source heat pump in the monoblock design with integral 190 litre DHW cylinder.

Rated heating output: 2.6 to 13.4 kW
Integral DHW cylinder
Specially developed for modernisation
Cooling function

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Rated heating output

2.6 to 13.4 kW

Integral DHW cylinder

With a capacity of 190 litres

Highly suitable for modernisation

With 70 °C flow temperature (at an outside temperature down to -10 °C)

Cooling function

Heating and cooling in one

Climate Protect +++

Environmentally responsible, natural refrigerant R290 (propane) with a particularly low GWP100 (global warming potential) of 0.02


Reliable operation with high efficiency

Super silent

Whisper-quiet operation allows free placement on the property

Low running costs due to high efficiency

COP (coefficient of performance) to EN 14511: up to 5.3 (at A7/W35)

60 % less space required

Compared to comparable models

Integrated energy management system

Ensures transparency in energy consumption and costs

Easy operation via ViCare app

Easy operation via ViCare app

Can be split for easier handling

In confined spaces

Vitocal 252-A compact air source heat pump in use

Highly suitable for modernisation:  Vitocal 252-A

The new generation of heat pumps

Reliable, compact and more environmentally responsible than ever – the new, innovative heat pump technology from Viessmann makes particularly efficient use of environmental energy for heating and cooling. With a flow temperature of up to 70  °C, the  Vitocal 252-A was specially developed for modernisation projects. Existing radiators can continue to be used. Underfloor heating is not essential. High energy efficiency, convenient control via app, sustainable operation and attractive design are all convincing features.

Viessmann's integrated range of solutions for the Vitocal 252-A

Value added services, digital services, connectivity & platforms


The Viessmann FörderProfi service streamlines and simplifies the entire subsidies process, from application to payment.

More about FörderProfi

ViCare app

The ViCare app provides intuitive heating control. Green for go – the user can see at a glance in the app whether their heating system is working as it should.

More about the ViCare app

ViGuide app

ViGuide is an app for trade partners. It has numerous functions for monitoring and controlling systems in both detached houses and apartment buildings and provides rapid access to Technical Service.

More about the ViGuide app


Smart electricity tariffs for your home. Flexible, green and 100% renewable. The electricity tariffs are set by Energy Market Solutions GmbH (EMS) – the contractual partner in the ViShare Energy Community and a Viessmann Group subsidiary.

More about ViShare

Benefits of the Vitocal 252-A

Climate Protect+++ protects the environment and the climate

The new heat pumps in the  Vitocal 25x series use the "green" refrigerant R290 (propane), which is considered particularly environmentally responsible with its very low GWP100 (global warming potential) of 0.02.

The Climate Protect label is based on the TEWI (total equivalent warming impact) indicator, which identifies the lifecycle efficiency of the appliance and the global warming potential of the refrigerant used.

One system for everything:  Viessmann One Base

The platform integrates any smart home solutions already in use, seamlessly and wirelessly. It can be easily expanded, for example with a Wallbox for charging an electric car. As members of the ViShare Energy Community, users can easily track their sustainable use of electricity and heat via  Viessmann One Base. The operator and contractual partner in the ViShare Energy Community is Energy Market Solutions GmbH.

Viessmann One Base  is compatible with all additional digital services. The integrated services and devices can be easily controlled with voice assistants such as Amazon Alexa and Google Assistant. The new platform is the basis for an expandable and futureproof energy system in every home.

Always in the best of hands

All that is needed to communicate with  Viessmann One Base is the free ViCare app; the integrated Viessmann Energy Management System does the rest. Viessmann One Base is operated quickly and easily via the app. The contractor can also keep a remote eye on the system and correct possible irregularities immediately by electronic means. This eliminates unnecessary travel and appointments with the trade partner.

Viessmann One Base  makes the home more comfortable, efficient and futureproof.

Comfort at the touch of a finger: simple and convenient control of the energy system from anywhere.

Viessmann One Base is operated quickly and easily with the ViCare app

All Viessmann systems and smart home solutions on one platform

With  Viessmann One Base, the entire energy system is operated via just one app –– simply, reliably and quickly. The new platform links all devices and electronic applications in the home into one single climate and energy solution. With beneficial consequences: lower energy consumption, a smaller carbon footprint and an overview of running costs that is always up to date.  Viessmann One Base makes your own four walls fit for a climate friendly future!

Viessmann One Base connects digital services with complete energy systems, consisting of heat pump, ventilation system, electricity storage and photovoltaic system.

OptiPerform –– reliable operation with maximum efficiency

The advanced heat pumps from Viessmann work with a patented hydraulic system. With Hydro AutoControl®, the heat pump is operated reliably and with maximum efficiency throughout its entire service life. The unique design not only ensures that your contractor can set up the heat pump with OptiPerform much faster and, therefore, more cost effectively. It also takes up much less space because it is up to 60  percent smaller than comparable systems.

Super silent –– whisper-quiet in full and partial load operation

Viessmann heat pumps are among the quietest of their kind thanks to advanced acoustic design+, and include a sound-optimised fan. Combined with intelligent speed control, it significantly reduces airborne noise in both full and partial load operation. As a result, the outdoor unit can be installed even in densely built-up areas such as terraced housing or close to the property boundary.

Keeping track with the ViCare app

With the energy cockpit in the ViCare app, users can keep track of all the energy flows in their home.  The analysis tool shows current and past levels of self-sufficiency and self-consumption.

The ViCare app's energy cockpit and analysis tool

Viessmann One Base – many benefits at a glance

  • Convenience: Control of the energy system via app. Can be linked if required with other devices and services such as Amazon Alexa, Google Assistant and more.
  • Efficiency: The platform links up and optimises energy flows for especially efficient and therefore cost effective operation.
  • Reassurance: The contractor is automatically notified of any irregularities and can take corrective action online before the situation gets out of hand.
  • Sustainability: Long term integration of all required digital services, upgrades and product expansions, such as photovoltaics with a energy storage system and a Wallbox for e-mobility.
ViCare thermostatic radiator valves enable straightforward control of individual rooms via app or voice command, e.g. using Amazon Alexa.

Product details

Rated heating output (kW), operating point A7/W35 (to EN 14511)

Type 251.A10: 7.3  kW | type 251.A13: 8.1  kW

Coefficient of performance ε (COP) A7/W35

Type 251.A10: 5.3 | type 251.A13: 5.2

Energy efficiency ƞs*

Energy efficiency ƞs at W35 in %: Type 251.A10: 197 | type 251.A13: 181

*Heating performance data in line with Commission Regulation (EU) No  813/2013 under average climatic conditions for low temperature application (W35) and medium temperature application (W55)

Energy efficiency class, DHW heating


Application area

Detached houses, modernisation projects


Heat pump control unit with 7  inch colour touchscreen, operation via ViCare app possible

DHW heating

Integral DHW cylinder (190  l capacity)

Additional features

For room heating/cooling and DHW heating | Maximum flow temperature: 70  °C (at an outside temperature of down to ––10  °C) | Monoblock indoor unit with heat pump control unit, high efficiency circulation pump for the secondary circuit, 4/3-way valve, safety assembly | Integral instantaneous heating water heater | Integral heating water buffer cylinder and overflow valve

Product cross-section of indoor unit with one integral heating/cooling circuit
Product cross-section of indoor unit with one integral heating/cooling circuit
Product cross-section, outdoor unit
How can we help?

Tap on the button below to WhatsApp us at +65 8028 0468 during office hours (Mondays – Fridays, 9am – 6pm), or select Contact Form below to provide us with details of your enquiry. We will get back to you as soon as possible.

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