Backward-Curved Centrifugal Fans: High-Efficiency Airflow Solutions from ECOFIT/Rosenberg

Backward-curved centrifugal fans, such as the ones from ECOFIT product line, are engineered to offer high efficiency and versatility in a range of applications. Unlike traditional fan designs, these backward-curved fans can function without a scroll housing, though they are adaptable to various housing shapes, such as circular, rectangular, or scroll designs, provided there is adequate clearance for optimal airflow.

Key Features and Construction: 

• Impeller Material: The backward-curved fans feature impellers made from either plastic or galvanized steel. This construction ensures durability and high-performance airflow, even in demanding environments.
• Impeller Sizes: Available in a range of diameters, from 192mm to 337mm, these fans provide flexibility in terms of airflow and pressure, allowing customization for specific application needs.
• Motor Technology: ECOFIT offers both AC (Alternating Current) and EC (Electronically Commutated) motor options. AC motors are speed-controllable through voltage variation, while EC motors offer superior energy efficiency, speed control, and reduced power losses.
• Performance: These fans are capable of delivering airflow capacities ranging from 780 to 3300 m³/h, with pressure values between 450 to 700 Pa. Their robust performance makes them ideal for a wide range of industrial and commercial uses.
• Integration Options: ECOFIT’s backward-curved fans can be installed as standalone units or integrated with pre-assembled inlet rings for added modularity, making them suitable for various housing configurations.

ECOFIT Fan Configurations:+ RRE, RRM, and RRE(inv)

ECOFIT fans are available in different configurations, each designed to meet specific performance needs. 

• RRE (External Rotor Motor): Featuring an external rotor motor, the RRE model allows for a more compact design and efficient heat dissipation. This configuration is ideal for HVAC systems where performance and reliability are critical.
• RRM (Internal Rotor Motor): The RRM model is built with an internal rotor motor, enclosed within the fan assembly. This robust design can handle higher mechanical loads, making it suitable for heavy-duty industrial applications that demand more torque and power.
• RRE(inv) (Inverter-Ready External Rotor Motor): Similar to the RRE model, the RRE(inv) is designed to work with inverter control systems. This feature allows for variable speed operation, enhancing energy efficiency and providing precise airflow control in applications where this is essential.

Each of these configurations offers a unique solution tailored to specific operational requirements, ensuring optimal performance and energy efficiency.

Motor Comparison: AC vs. EC Technology 

• AC Motors: The AC motors in the ECOFIT line are controllable via voltage variation and require compatible motor-run capacitors. These motors offer reliable performance and are ideal for general-purpose applications.
• EC Motors: EC motors, on the other hand, provide advanced efficiency and precise control. With no slippage and fewer power losses, EC motors outperform traditional AC designs. They allow for easy integration with 0-10VDC or PWM control signals and feature soft-start capabilities, along with protection mechanisms such as locked rotor protection. EC motors are highly energy-efficient, contributing to significant energy savings over time.

Advantages of EC Technology: 

• Energy Efficiency: EC motors are designed to consume significantly less energy compared to traditional induction motors. In many cases, they use up to 50% less electricity, making them ideal for energy-conscious applications. Their efficiency is maintained even at part speed, further reducing operational costs.
• Cooler Operation: These motors run cooler than conventional AC motors, minimizing waste heat and reducing the strain on cooling systems. This not only saves energy but also extends the lifespan of critical components like windings and bearings.
• Noise Reduction: Due to their advanced design, EC motors operate with minimal noise, making them perfect for noise-sensitive environments such as cleanrooms, data centers, and offices.
• Broader Operating Range: EC motors offer a wider operating range, meaning that a single EC motor can replace multiple models of traditional motors, streamlining inventory and reducing operational complexity.
• Advanced Control Features: EC motors allow for easy speed control, constant volume, or constant airflow capabilities through integrated electronics. These features make them highly adaptable to modern HVAC systems, refrigeration units, and specialized industrial applications. 

To Explore Rosenberg EC Technology, Join our LinkedIn Group : https://www.linkedin.com/showcase/rosenberg-ec-technology/

Applications of Backward-Curved Fans: 

• Air Curtains: ECOFIT backward-curved fans are perfect for air curtain systems. Their modular designs enhance airflow performance in both industrial and commercial spaces, helping to create effective air barriers.
• Air Filtration: The fans are integral to air filtration systems, ensuring clean, continuous airflow to maintain optimal indoor air quality in various environments, from industrial workshops to commercial buildings.
• Evaporators: These fans are crucial in refrigeration applications, particularly in evaporators. Their high-efficiency design ensures consistent air circulation, supporting effective heat transfer and cooling in refrigeration systems.
• Equipment Cooling: ECOFIT backward-curved fans are widely used for equipment cooling, providing necessary airflow to prevent overheating in electrical cabinets, control panels, and industrial machinery.

Benefits: 

• Energy Savings: The use of EC motor technology allows for significant energy savings, contributing to lower operational costs and shorter payback periods.
• Customization: With a variety of impeller sizes, motor types, and optional features like inlet cones and alarm signals, these fans can be tailored to specific project needs, providing maximum flexibility.
• Quiet and Reliable Operation: The backward-curved impeller design minimizes noise, ensuring quieter operation in environments where sound control is essential. Additionally, their robust construction ensures long-lasting, reliable performance with minimal maintenance. 

ECOFIT backward-curved centrifugal fans, with both AC and EC motor options, provide a versatile, energy-efficient solution for a wide range of applications, from HVAC systems to refrigeration and industrial processes. Their advanced design, combined with superior motor technology, makes them essential for optimizing airflow, reducing energy consumption, and improving overall system performance.

For more detailed performance data, technical specifications, and application insights, visit the Rosenberg Fans Canada website or consult ECOFIT’s product literature. These high-performance fans are key components for any energy-conscious business looking to improve air movement efficiency.

Contact Us

Rosenberg Canada is an industry-leading manufacturer and supplier of high-quality industrial fans and blowers. We offer a complete range of OEM industrial fans and blowers for a variety of applications—Axial, Centrifugal, Plug, and Plenum Fans of different design, size, and capacity.

Our experienced and knowledgeable staff will help you to find an HVAC solution suitable for any industry. Rosenberg Fans Canada has various options to accommodate any OEM Heating, Air Conditioning, Refrigeration, or HVAC Retrofit applications.

Since 2005, Rosenberg Fans Canada Ltd., located in Mississauga, Ontario, has been the sales office and warehouse of the Rosenberg Group in Canada. We provide sales, stock, local assembly, engineering and after-sales solutions to our customers in the Greater Toronto Area and Canada nationwide.

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