Gas condensing solar centre

Eligible for subsidies, the CSZ-2R is the perfect combined solution for solar and gas. Perfectly matched, highly efficient and space saving.

Do you want to use free solar energy for most of the DHW heating in your detached house? Then the WOLF CSZ-2R gas condensing solar centre, combined with WOLF TopSon F3-1 solar collectors, is the efficient and resource saving heating system for you. All the components of your solar centre come from a single source and are perfectly matched. This makes them particularly reliable and efficient.

The CSZ-2R can provide up to 60 % of the energy required for DHW heating from the solar thermal side. This significantly reduces your gas consumption. Furthermore, the CSZ-2R is eligible for subsidies according to the Renewable Energies Heat Act [Germany]. Find out more on our Subsidies page.
Also good to know: despite the large 300 l DHW cylinder, the CSZ-2R requires a footprint of only around 0.5 m2, for example in the roof space or basement. The appliance operates extremely quietly, so you can pursue your hobbies or sporting activities without being disturbed.

  • Short Info
  • Specification

The perfect combined solution comprising gas and solar for DHW heating.

The solar centre heats spacious detached houses and apartment blocks, and consists of the following components: WOLF CGB-2 gas condensing centre, BM-2 programming unit, 300 l solar cylinder, a high efficiency solar pump assembly including WOLF SM-1 solar controller, 25 l solar expansion vessel and the container for the solar fluid. The solar cylinder is sized for three solar collectors. You can control the entire system with utmost convenience via the BM-2 programming unit. In addition, the system can be very easily integrated into a SmartHome system via an extension module.

  • Solar cylinder with high quality thermal insulation, including floor insulation, prevents quick cooling down and unnecessary operation of the system
  • Highly efficient: in combination with a solar thermal system, energy efficiency class A+ is achieved for the entire heating system
  • Versatile siting options within the home: the appliance fits into any corner and features a stylish, compact design
  • Good access to all components for convenient operation and quick, time saving service
  • Energy saving thanks to solar boiler stop, i.e. the boiler switches off when sufficient solar heat is available 
  • Equipped with the new SmartHome-enabled WOLF control system, allowing you to operate and monitor the system even while out and about 
technical drawing
Model / Performance
  • CSZ-2-14/300R
  • CSZ-2-20/300R
  • CSZ-2-24/300R
Please choose model
Gas condensing solar centre CSZ-2R
Model type CSZ-2-14/300R CSZ-2-20/300R CSZ-2-24/300R


max. 14kWmax. 19kW max. 24kW


Condensing x x x
Conventional - - -

Combination with

Heat pump - - -
Solar x x x
Mechanical ventilation - - -

DHW heating

Combi, integ. Instantaneous water heating - - -
integr. water cylinder x x x
ext. water cylinder - - -
DHW power output (l/Min) 175 210 210
cylinder size (equivalent) - - -

Modulation range 50/30°

2,1-15,24,4-20,4 6,6-25,8

Energy efficiency class

central heating A A A
DHW heating A A A

General info 

Heating output (rated heat input)

Heating mode in (kW) 14kW 19kW 24kW
DHW heating in (kW) 13,5kW 22,2kW 27,1kW

Efficiency (standard seasonal efficiency)

at 40/30° (Hi/Hs) in % 110/99 110/99 110/99
at 75/60° (Hi/Hs) in % 107/96 107/96 107/96

Dimensions/ weight

Height (mm) 1850 1850 1850
Width (mm) 600 600 600
Depth (mm) 1013 1013 1013
Total weight (kg) 160(35+125) 160(35+125) 160(35+125)

Noise level

max. dB46 47 48

Power consumption

Standby (W) 3 3 3
max. heating/DHW (W) 59 63 88

WOLF SmartSet Ready

x x x

wiButler ready

x x x


The WOLF CSZ-2R captures free solar energy and transforms your house into an oasis of wellbeing.

The power of the sun coupled with the convenience of advanced gas condensing technology – a combination that will convince you to bring environmental energy into your home. The life cycle assessment of these systems in solar operating mode is outstanding. Heating your DHW with solar energy creates virtually no carbon dioxide and consumes no limited fossil fuel resources. This level of sustainability gives you the reassurance that you are protecting the environment and allows you to sit back and enjoy your oasis of wellbeing. And to top things off, the sun will not be sending you a bill.

Whether you're looking at heating, ventilation or cooling

Whether you're looking at heating, ventilation or cooling – at WOLF we are only satisfied when all these elements come together to provide you with an indoor environment where you can truly relax. We want technology to fit around you, not the other way round.
And because your requirements may change over time, we offer you full control of your heating system, DHW temperature and air change rates with our user friendly devices, intuitive apps, and SmartHome enabled programming units –so your living zone is also your comfort zone.