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 +++: Protects the environment and the climate

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.

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.

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.

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
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