Grundfos MAGNA1: The Versatile Legend in High-Efficiency Circulation
Engineered for reliability, the MAGNA1 is a high-performance circulator tailored for commercial heating and cooling systems. It’s the perfect solution for projects that prioritize straightforward control without sacrificing power. Drawing on over six decades of hydronic engineering, the MAGNA1 serves as a seamless, drop-in replacement for aging, fixed-speed pumps—slashing energy costs while maintaining peak system performance.
Material Versatility: Available in both Cast Iron and Stainless Steel to suit any heating or cooling application.
Technical Summary
Motor Type: High-efficiency ECM
Starting Torque: 360 mNm (Debris clearing)
Installation: Tool-free electrical plug options and compact design.
Protection: Integrated motor protection and Magnetite resistance.
Grundfos MAGNA3: The Smart Standard in High-Efficiency Circulation
More Than a Pump—A Complete System Solution.
If your project demands the highest efficiency ratings on the market, combined with advanced system intelligence and a comprehensive range, the MAGNA3 is the definitive choice. Engineered for versatility, it is the premier solution for:
Commercial Heating & Cooling
Ground Source Heat Pump Systems
Domestic Hot Water Recirculation
Intelligence Powered by Innovation
The MAGNA3 isn't just an upgrade; it’s a technological leap. Built on the foundation of our field-proven MAGNA technology and decades of expertise in electronic pumping, this circulator brings together:
Permanent Magnet Motor: Delivers unmatched energy savings and mechanical longevity.
Integrated Frequency Converter: Automatically adjusts performance to meet real-time system demands.
AUTOADAPT Technology: The pump "learns" your system's patterns and finds the most efficient duty point, ensuring you never use more power than necessary.
Engineered for Every Environment
The MAGNA series is designed for maximum versatility, providing high-efficiency performance across a wide range of commercial and residential applications:
HVAC & Climate Control
Commercial Heating & Cooling: The primary workhorse for large-scale hydronic systems, ensuring consistent temperature regulation.
Chilled Water Systems: Optimized for low-temperature environments, providing reliable circulation for cooling loops and air conditioning.
Hydronic Venting: Precisely engineered to manage air removal and pressure stabilization within your piping network.
Renewable & Specialized Energy
Ground Source Heat Pumps: High-performance circulation specifically designed to handle the unique flow requirements of geothermal loops.
Snow Melt Systems: Powerful enough to manage the high-viscosity fluids and heavy demands of outdoor radiant heating for walkways and driveways.
Domestic Water Solutions
Hot Water Recirculation: Using stainless steel housing options, the MAGNA ensures instant hot water delivery while meeting strict potable water standards.
Which one is right for you?
The MAGNA1 is your "workhorse"—it’s perfect for contractors who want a quick installation that vastly outperforms old-school fixed-speed pumps.
The MAGNA3 is your "brain"—it's designed for engineers who need to monitor every BTU and integrate the pump into a larger building ecosystem.
Which Application Do You Need to Solve?
The MAGNA series provides high-efficiency performance across a wide range of commercial and residential environments.
HVAC & Climate Control
- Commercial Heating & Cooling: Primary temperature regulation for large-scale loops.
- Chilled Water Systems: Reliable performance for cooling loops and AC units.
- Hydronic Venting: Precision management of air removal and pressure.
Renewable & Specialized
- Ground Source Heat Pumps: Engineered for the unique flow of geothermal loops.
- Snow Melt Systems: High-torque power to handle high-viscosity fluids.
Domestic Water
- Hot Water Recirculation: Instant delivery using stainless steel housing for potable water standards.
Application Decision Matrix
| Requirement | MAGNA1 (Essential) | MAGNA3 (Advanced) |
|---|---|---|
| Standard Heating/Cooling | ||
| Geothermal Loops | ||
| Smart Building / BMS Integration | ||
| Critical Flow Monitoring |

