Wilo Yonos Circulator Pumps bring electronic control and high-efficiency motor technology together in a versatile range of glandless circulators for heating and cooling applications. Circulator pumps run quietly in the background, but they are among the hardest-working components in a building, so choosing an efficient, well-controlled pump has a real effect on running costs and system performance.
What Is the Wilo Yonos Range?
Yonos is Wilo’s family of high-efficiency, electronically controlled glandless (wet-rotor) circulators. The Yonos PICO is a glandless, electronically controlled circulator for sealed central heating and cooling systems. The Yonos MAXO is an electronically controlled high-efficiency pump, available in screw-end or flange-end versions. Together they cover applications from compact residential systems through to larger commercial buildings.
Why Energy-Efficient Circulation Matters
In a heating or cooling system, the circulator often runs for long periods throughout the season. A conventional uncontrolled pump runs at a fixed output whether or not the system needs it, which wastes electricity. An electronically controlled circulator adjusts its output to match demand, so it only uses the energy the system requires. Over the life of the pump, that can make a meaningful difference to operating costs.
Key Features and Benefits
High-efficiency EC motor technology. EC motors use far less electricity than conventional uncontrolled circulators. Yonos PICO models achieve a minimum power consumption of just 4W.
Electronic control for flexible performance. Rather than running at a fixed output, the pump adapts to what the system needs. Control modes include constant differential pressure (Δp-c) and variable differential pressure (Δp-v). Matching the pump to the system avoids wasted energy and can reduce flow noise.
Simple Green Button operation. The central green operating button gives an intuitive interface for adjusting settings for radiators or underfloor heating. Installers can commission quickly, without complicated menus.
Sizes and configurations for different buildings. The range includes threaded and flanged options, so you can match the pump to your pipework and flow requirements.
Which Yonos Pump Suits Your Application?
Yonos PICO suits heating and cooling circulation in residential and light commercial systems. It is particularly aimed at one- to six-family houses.
Yonos MAXO is built for larger installations. The MAXO-D twin-pump version can be used with the Wilo-Connect module for dual-pump management and integration into a building management system.
Typical Applications
🔹 Hot-water heating systems
🔹 Air-conditioning and cooling systems
🔹 Residential and commercial building services
🔹 Primary and secondary circulation loops
What to Consider When Choosing a Circulator Pump
Selecting the right pump is about matching it to the system, not just choosing the biggest or smallest option. Before you specify a circulator, consider:
✓ Flow rate and head: How much water needs to move, and how much resistance the pump must overcome.
✓ Connection type and size: Threaded or flanged, and the pipe diameter and port-to-port length, especially for replacements.
✓ System type: Radiators, underfloor heating, or cooling circuits can call for different control settings.
✓ Building size and complexity: Larger commercial systems may need flanged pumps or twin-pump arrangements.
Getting these details right helps the pump run efficiently and reliably for years.
Frequently Asked Questions
What is a glandless circulator pump?
It is a pump where the motor and impeller share the same fluid-filled chamber, with no shaft seal. This design is compact, quiet and low-maintenance, and it is why glandless circulators are popular in heating and cooling systems.
Why choose an EC motor circulator over a conventional pump?
EC motors adjust their speed to demand and use much less power than fixed-speed alternatives, which lowers energy use over the pump’s life.
Can Yonos pumps be used for cooling systems?
Yes. The range is suited to both heating and air-conditioning or cooling circuits.
How do I choose the right Yonos pump?
Selection depends on flow rate, head, pipe size, system type and fluid temperature. Our team can recommend the right model for your application.
Wilo Yonos Pumps from Pump & Valve Specialties
As the official Wilo distributor in New Zealand, Pump & Valve Specialties Ltd supplies and supports Wilo pumping solutions nationwide. Whether you are specifying for a new build, upgrading an existing system or looking for a like-for-like replacement, we can help you select the right Yonos circulator.
Talk to our team:
📞 0800 786 774
📧 sales@pumpandvalve.com
Explore Wilo pumping solutions: https://pumpandvalve.com/brand/wilo