Circulation pump Grundfos MAGNA3 100-40 F PN10

The Grundfos MAGNA3 circulation pump is the ideal choice for almost any building project, old or new. With its unrivaled energy efficiency, comprehensive range, and built-in communication capabilities, the MAGNA3 is ideal for engineers and designers who want to create high-performance heating and cooling systems. The pump is maintenance-free thanks to its encapsulated rotor design. This also means that the pump and motor form an integral unit with no shaft seal and only two gaskets for sealing. The bearings are lubricated by the pumped liquid. The MAGNA3 has an intuitive display and allows it to connect wirelessly with the Grundfos GO Remote app, giving access to advanced reporting and monitoring. The pump includes fieldbus communication via CIM modules, analog and digital inputs, and configurable relays. Control features include FLOWADAPT, which reduces the need for throttle valves, thus cutting costs on system components.

Rated flow: 24.91 m³/h
Rated head: 4.806 m
Maximum head: 40 dm
TF class: 110
Type of connection: DIN
Size of connection: DN 100
Pressure rating for connection: PN 10
Port-to-port length: 450 mm
Maximum power input – P1: 493 W
Mains frequency: 50 / 60 Hz
Rated voltage: 1 x 230 V
Maximum current consumption: 2.35 A
Net weight: 33.1 kg
Gross weight: 36.4 kg

The MAGNA3 100-40 F PN10 is a modern circulation pump designed for heating, cooling, and domestic hot water systems where consistent performance and energy savings matter. It ensures stable temperatures across the building, lowers running costs, and operates quietly, making it ideal for apartment blocks, offices, hotels, and commercial facilities.

Typical applications

• Central circulation in large heating systems with radiators, underfloor heating or mixing circuits
• Domestic hot water loops for instant hot water availability
• Cooling and air-conditioning circuits with heat exchangers
• Geothermal circulation and recirculation systems

Key benefits for operators

Thanks to AUTOADAPT™ intelligent control, the pump automatically adjusts to the real demand of the system, reducing wasted energy. Dry-run protection improves reliability, while the robust casing and impeller materials guarantee long service life. Stable circulation eliminates temperature fluctuations and makes the system easier to maintain.

Why choose the MAGNA3 series

With advanced algorithms that automatically balance hydraulics, this series removes the need for complicated manual adjustments. Whether for modern heating systems or demanding cooling loops, the MAGNA3 line adapts effortlessly and delivers measurable efficiency over time.

Model-specific notes PN10

• Installation must be carried out by certified HVAC specialists (unit not plug-ready).
• PN 10 flanged version — suitable for systems up to 10 bar operating pressure.
• Always follow the manufacturer’s manuals for installation, operation, and servicing.
• In combined systems with heat generators or gas appliances, all work must be done by authorised contractors to ensure compliance and safety.