Above 95 %
Up to 92 %
85 %
Up to 30 %
EC+ system efficiency and compact AHU design
With motor and frequency drive efficiencies above 95% and ZerAx fan efficiencies up to 92%, the EC+ system achieves a remarkable overall efficiency of 85%. This is 20–25 percentage points higher than typical alternatives such as direct-driven centrifugal plug fans with EC motors. It is the highest AHU system efficiency available today.
The high ZerAx efficiencies enable AHU designs that are up to 30% shorter and 30% lighter without compromising performance, reducing both installation space and cost. ZerAx fans are delivered as complete plug-and-play units to simplify installation and speed up commissioning.
Sound levels are significantly lower than those of conventional fans, and lifetimes exceed 20 years, contributing to long-term sustainability and reduced maintenance costs.
EC+ system efficiency and compact AHU design
With motor and frequency drive efficiencies above 95% and ZerAx fan efficiencies up to 92%, the EC+ system achieves a remarkable overall efficiency of 85%. This is 20–25 percentage points higher than typical alternatives such as direct-driven centrifugal plug fans with EC motors. It is the highest AHU system efficiency available today.
The high ZerAx efficiencies enable AHU designs that are up to 30% shorter and 30% lighter without compromising performance, reducing both installation space and cost. ZerAx fans are delivered as complete plug-and-play units to simplify installation and speed up commissioning.
Sound levels are significantly lower than those of conventional fans, and lifetimes exceed 20 years, contributing to long-term sustainability and reduced maintenance costs.
Dynamic pressure is the key to higher efficiency
HVAC systems that only use static pressure cannot reach efficiencies above 90%, as dynamic pressure is lost. To maximise system efficiency, fans must utilise both static and dynamic pressures, which leads to higher performance, lower energy use, reduced operating costs and lower carbon emissions.
Centrifugal and plug fans calculate efficiency solely on static pressure because they cannot recover dynamic pressure, which is then wasted. Axial fans, by contrast, use both static and dynamic pressure, allowing efficiency calculations based on total pressure and enabling efficiencies above 90%.
Despite their simple appearance, centrifugal and plug fans often become costly choices over time — both operationally and environmentally. High-efficiency axial fans use less energy, reduce emissions and minimise running costs, making efficiency a decisive factor when selecting a fan solution.
ZerAx and market-leading fan efficiencies
Many centrifugal fans operate at efficiencies between 65–70%, while standard axial fans typically reach around 80%. The difference stems from the airflow direction:
- In axial fans, air flows parallel to the fan axis, maintaining velocity.
- In centrifugal fans, the airflow shifts perpendicularly, losing most of its energy.
Axial fans therefore experience minimal energy loss due to their aerodynamic design, which delivers straight, low-turbulence airflow and consistently higher efficiency.
NOVENCO ZerAx®
Axial fans achieve efficiencies up to 92%, setting new benchmarks for fan performance. These efficiencies reduce power consumption and lower sound levels, making ZerAx the most energy-efficient axial fan range available.
EC+ concept brochure
