ALPHA2 circulator pump - heating, cooling, hot water



ALPHA2 is the best pump to withstand the tough conditions in a heating system, and with four newly added features, it just got even tougher:  

Robust start-up:

Shakes free any impurities before the pump starts at the beginning of the heating season.

Summer mode:

Adjustment of the pump’s performance in the summer to the warmer temperature outside – giving customers extra energy efficiency

Magnetite resistance:

Ensures that no small pieces of metal get stuck in the pump’s vital parts when they are magnetised

Dry-running protection:

Makes sure the pump never runs without liquid in the system

Add to that unrivalled energy efficiency, easy installation and the fact that ALPHA2 covers both your heating demands and up to 90 % of your air-conditioning and cooling demands.

Get all the technical details about ALPHA2 right here
The GRUNDFOS ALPHA2 is suitable for:

  • Systems with constant or varying flow
  • One pipe systems
  • Two pipe systems
  • Underfloor-heating
  • Domestic hot-water recirculation
  • Systems where night setback is required.

Features and benefits

  • Better performance with market leading efficiency (EEI≤0.15) in a more compact design
  • New flow meter for trouble-shooting and balancing
  • AUTOADAPT selects best performance curve for efficiency and comfort
  • Innovative plug simplifies pump connection
  • Insulation shells included.


  • Low energy
  • AUTOADAPT control mode
  • Low noise



Certificate VDE

VDE Prüf- und Zertifizierungsinstitut (Certificate)

VDE Prüf- und Zertifizierungsinstitut

Grundfosliterature-5564527.pdf (644 KB)

Best in Test - VDE

Best in Test - VDE (Data Sheet)

Best in Test - VDE

Grundfosliterature-5564529.pdf (198 KB)

ALPHA2, Data sheet


The new ALPHA2 takes reliability in small domestic circulators to new heights. Even in systems where the operational environment is a challenge, the ALPHA2 will ensure long-lasting trouble-free operation with no risk of blockage.

Grundfosliterature-5768685.pdf (284 KB)



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