EC Dual-Inlet Centrifugal Blower Fans for Compact HVAC Systems

In the ever-evolving landscape of ventilation, HVAC, and industrial cooling systems, compactness, energy efficiency, and intelligent integration are more important than ever. AFL’s EC Dual-Inlet Centrifugal Blower Fans are engineered to meet these demands—offering powerful performance in a compact footprint with full customization capabilities.

Engineered for High Performance in Tight Spaces

AFL’s EC centrifugal blowers are available in 12 sizes, ranging from ⌀120 mm to ⌀400 mm, with power options from 70W to 2kW, offering optimal airflow for a wide variety of applications, including:

• Compact Air Handling Units (AHU)

• Fan Coil Units and Dampers

• Industrial Air Heaters

• Forced cooling for power converters, generators, and telecom systems

Built with EC motor technology, forward or backward curved blades, and variable speed control, our blowers provide quiet, stable, and energy-efficient operation in even the most demanding environments.

Product Features

• EC Dual-Inlet Design – Higher airflow in limited spaces

• Compact Dimensions – Ideal for modular AHUs and fan coils

• Forward or Backward Curved Blades – Matched to your static pressure needs

• Low Noise Operation – Designed for residential and commercial comfort

• Smart Control Compatibility – Easily integrates with remote monitoring and BMS

• Customization Ready – Airflow curve, voltage, casing, interface — all tailorable

• Durable Build – Long-life bearings and corrosion-resistant coatings available

Applications Across Industries

FAQ Questions (Schema-ready)

Q1: What are the advantages of EC dual-inlet centrifugal blower fans in compact HVAC systems?
A:
EC dual-inlet centrifugal fans offer high airflow in a compact size, making them ideal for limited-space HVAC systems. Their energy-efficient EC motors and variable-speed control reduce power consumption while maintaining consistent static pressure, especially in fan coil units and modular AHUs.

Q2: How does the dual-inlet design increase airflow compared to single-inlet fans?
A:
Dual-inlet centrifugal fans draw air from both sides of the impeller, effectively doubling intake volume without increasing the fan’s footprint. This design enables higher airflow rates in tight enclosures, perfect for telecom cabinets, power electronics, or compact air-handling modules.

Q3: What makes EC motors more energy-efficient than traditional fan motors?
A:
EC motors use brushless DC technology with integrated speed control, delivering higher efficiency (up to 90%) compared to AC motors. They reduce energy waste, support intelligent BMS integration, and eliminate the need for external VFDs in HVAC or industrial systems.

Q4: How do backward-curved blades help improve pressure and reduce noise?
A:
Backward-curved blades generate higher static pressure while minimizing turbulence and sound emissions. They’re ideal for ducted ventilation systems or cooling applications with airflow restrictions, ensuring low-noise, high-efficiency operation across various industrial and HVAC environments.

Q5: Which industries typically use compact centrifugal blowers for cooling and ventilation?
A:
Industries like HVAC, telecom, data centers, power electronics, medical equipment, and industrial machinery all rely on compact centrifugal blowers. These fans provide localized, high-pressure airflow for modular AHUs, fan coil units, and compact enclosures in mission-critical systems.

Q6: How can I select the right centrifugal fan for a modular air handling unit?
A:
Key factors include airflow rate (CFM), static pressure (Pa), voltage requirements, available space, and integration method (frame vs. plug-in). AFL provides fan models in 12 sizes and supports performance customization to meet specific AHU dimensions and system needs.

Q7: Can centrifugal fans be integrated with smart building management systems?
A:
Yes. AFL’s EC centrifugal fans offer analog (0–10V) and digital PWM control, enabling seamless integration with BMS platforms. This allows real-time speed modulation, energy monitoring, and failure diagnostics—ideal for smart commercial buildings or energy-efficient retrofits.

Q8: What power range and sizes are available for AFL’s dual-inlet blowers?
A:
AFL EC dual-inlet centrifugal blowers come in 12 sizes ranging from ⌀120 mm to ⌀400 mm, with drive power from 70W to 2kW. This broad range supports airflow demands from compact units to high-volume, high-pressure industrial applications.

Q9: Do you offer OEM or ODM customization for fan integration projects?
A:
Yes. AFL supports full OEM/ODM customization, including motor configuration, airflow curve tuning, casing material, voltage, interface protocols, and mounting options. We collaborate with system integrators to ensure optimal performance and seamless mechanical fit.

Q10: What are common challenges in compact ventilation projects, and how can these fans help?
A:
Common challenges include limited space, high heat loads, noise restrictions, and BMS compatibility. AFL’s compact EC blowers solve these via dual-inlet airflow, EC energy-saving motors, quiet operation, and fully customizable interfaces for integration in tight or modular systems.

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• EC Centrifugal Fans for AHU Systems in Commercial Buildings

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Ready for OEM/ODM Fan Customization?

Whether you're building a new generation of compact HVAC units or upgrading forced-air cooling systems for electronics or industrial use—AFL’s team of engineers is ready to tailor the perfect fan to your airflow, static pressure, and dimensional needs.

Contact AFL for detailed specs, datasheets, and custom fan integration support.