Industrial Backward Curved Blowers & Fans
Industrial-Strength Backward Curved Fans for Maximum Efficiency
AirPro // Products
High-Efficiency Backward Curved Centrifugal Fans & Blowers
AirPro’s backward curved centrifugal fans and blowers deliver powerful performance with low energy consumption, making them a smart choice for a wide range of industrial applications.
Engineered with a backward-curved blade design, these fans efficiently move high air volumes at high static pressures while maintaining exceptional static efficiency. Ideal for clean air systems, they can also handle light dust and particulate, offering flexibility across process ventilation, combustion air, and general industrial airflow applications.
Backward Curved Fan Description
AirPro’s industrial backward curved technology delivers our highest efficiency performance, available in three models and an expanded range from 150-890. Engineered for flexibility, these models support high, medium, and low air volume applications with superior durability and performance.
Selecting the optimal fan depends on your system’s air volume and static pressure. Our experienced application engineers are here to help you identify the best match for your performance needs.
All three models are constructed with heavy-duty, industrial-grade materials to withstand demanding environments. Our customers count on AirPro to keep operations running smoothly, a responsibility we take seriously. That’s why reliability, efficiency, and precision are built into every backward curved fan we produce.
Backward Curved Blower & Fan Types
BCHS
Our highest volume backward curved model, the BCHS is built for induced draft applications and excels in forced draft systems that require large volumes of air.
BCMS
Designed for medium air volume applications, the BCMS achieves static efficiencies over 80%, making it a dependable and efficient option for both induced and forced draft systems.
BCLS
Featuring a narrow wheel and housing, the BCLS is optimized for lower air volumes at higher static pressures. It’s most commonly used to deliver combustion air in induced draft applications.
Industrial Backward Curved Fan Performance & Design
- Volume: up to 500,000 cfm
- Pressure: up to 70”wg
- Temperature: up to 1800°F
- Static Efficiency: up to 81%
- Drive: Belt & Direct
AirPro designs and builds both standard and custom industrial fans with an unsurpassed level of quality and service. All of our products are also backed by our industry-leading 3-year warranty.
FEATURED FAN
Food-Grade Backward Curved Fan for Dairy Facility
AirPro engineered this backward curved, tightly housed BCLS fan for a spray drying application at a Minnesota dairy facility producing food-grade whey protein. The design prioritizes sanitary construction and high performance.
This fan features a 42″ backward curved wheel reaching up to 1947 rpm. The fully welded airstream eliminates pits, cracks, and crevices, reinforced with a 304SS tri-clamp drain ferrule. Exterior skip welds are sealed with clear silicone to maintain hygiene.
A 75 hp TEFC motor sits on a white, food-grade epoxy coated pedestal for protection against dirt and moisture. Grease-lubricated bearings offer 100,000+ hours of run time. Spring vibration isolators, a vibration sensor, and bearing RTDs support long-term reliability.
- Product Type: BCLS
- Application: Spray Drying; Food-Grade
- Description: Class X, Arr. 8 V, 53bhp, 75hp, 150ºF max temp design
- Performance: 10,631 CFM @ 25″ wg static pressure
How the Backward Curved Fan Works
Backward curved fans use a centrifugal design to move air efficiently and reliably in high-pressure environments. Depending on your system requirements, the fan wheel can rotate either clockwise or counter-clockwise. Air enters through the fan inlet and is drawn into the center (inlet eye) of the wheel. As the wheel spins, centrifugal force accelerates the air, which then travels across the backward curved blades and exits through the fan housing.
The curved blade profile is key to its performance. It minimizes turbulence and maximizes energy efficiency, making backward curved fans ideal for moving large volumes of air at higher static pressures. This combination of high efficiency and robust performance makes them a go-to choice for demanding industrial applications where consistent airflow is critical.
Common Backward Curved Fan Applications
Induced Draft:
Used by many different industries, backward curved fans pull air through larger systems and often include custom design features.
Pollution Control:
Backward curved models are known for their efficient and reliable service in different air pollution control applications. These include oxidizers, dust collectors, scrubbers, and more.
Combustion Air:
Small, heavy-duty, high-efficiency fans are customized for combustion applications like boilers, burners, and others
Additional Applications:
Odor control, process heating, and dilution air are a few additional applications served by backward-curved technology.
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