Buffer cylinder

Store energy with the conventional SPU-2 heating water buffer cylinder.

A buffer cylinder operates like a battery: It can absorb heat in the form of warm or hot water and release it again later. A cylinder gives you the advantage of being able to balance out time differentials between heat being generated and consumed. This extends the service life of system components and increases the efficiency of your central heating system, as it isn't continuously cycling on and off on demand (fewer burner starts). The SPU-2 can easily be combined with one or more WOLF heating appliances, such as a gas or oil boiler, and is equipped with high grade thermal insulation.

  • Specification

This conventional heating water buffer cylinder is available in eight different sizes.

Store energy for your heating in the SPU-2 buffer cylinder. Perfect for owners of detached houses or apartment blocks, especially when combining several heat generators. The SPU-2 also features high grade thermal insulation and is available in different sizes.

  • The buffer cylinder protects your heat generator by reducing the number of burner starts (i.e. your gas or oil boiler is not continuously cycling on and off on demand)
  • The right cylinder for every requirement: Available from 500 l to 5000 l
  • The high grade, removable thermal insulation saves energy and facilitates transportation into the boiler room on delivery
  • The numerous connections provide a wide variety of options: A freshwater module, different heat generators, as well as stoves with back boilers can all be connected to the SPU-2
  • 5 year warranty on floorstanding DHW cylinders safeguards your investment
technical drawing
Model / Performance
  • SPU-2-500
  • SPU-2-800
  • SPU-2-1000
  • SPU-2-1500
Please choose model
Buffer cylinder SPU-2
Model type SPU-2-500SPU-2-800SPU-2-1000SPU-2-1500

Size /weight

Diameter incl. thermal insulation (mm) 8509909901200
Height incl. thermal insulation (mm) 1725178521352235
Total weight - empty (kg) 87109130205

Cylinder systems

DHW cylinders ----
Dual mode DHW cylinders ----
Heating water cylinders xxxx
Heating water buffer cylinders with integral DHW heating ----
Freshwater modules ----

Combination with

Heat pump ----
Solar x---

DHW heating

DHW output (l/Min)----
Cylinder size (equivalent)4907959801530
DHW capacity (l)----
Standby heat loss (kWh/24h) 2,032,593,023,67


Suitable for DHW heating ----
Suitable for central heating xxxx
Suitable for solar thermal ----
Suitable for heat pump ----
DHW heating with instantaneous water heating principle (integral hygiene function) ----


The WOLF SPU-2 stores heat for smooth running and trouble-free operation of your heating system.

The efficient buffer cylinders from WOLF store the heating water from your heat generator, such as a gas or oil boiler, and later release it into the heating circuit or freshwater module.
You can take it easy: Buffer cylinders from WOLF provide you with heat whenever you need it, protect the components of your heating appliance, save energy and also help protect the environment.

Grüner Ausblick aus dem Fenster

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.


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