The NIBE CPD 11-25/65 (Part Number: 6212347 or 067321 ) is an OEM PWM speed-controlled circulation charge pump manufactured by Grundfos (model equivalent UPM2 K 25-70 180mm).

It is designed to circulate heating fluid/water between NIBE heat pumps (such as the F2040/F2050 series or indoor modules like the VVM/SMO systems) and the home's heating distribution or domestic hot water storage.

Technical Specs

Compatible With

This charge pump is compatible with most Nibe heat pump systems, particularly:

• Air/water and ground source heat pumps

• Used as primary circulation pump, charge pump, or buffer loop pump

• Often found in systems where modulated flow control is required for efficient system response

Examples of compatible series:

• Nibe F2040 / F2120

• Nibe F1155 / F1255 / S-series

• Nibe VVM and SMO indoor modules

To confirm exact compatibility, check your Nibe unit’s technical documentation or internal label for pump specs.

Why It's Used

• Maintains optimal flow rate between heat source and buffer/DHW tank

• Works with variable-speed control signals from Nibe controllers

• Energy-efficient, reducing power consumption versus traditional pumps

• Built-in electronics respond to heat demand in real-time