Industrial Backward Curved Blowers & Fans
Industrial-strength backward curved fans for maximum efficiency.
AIRPRO // PRODUCTS
High-Efficiency Backward Curved Centrifugal Fans & Blowers
Industrial Backward Curved Fan Overview
AirPro’s backward curved centrifugal fans and blowers are engineered for efficient, reliable airflow in demanding industrial applications. Their backward curved blade design supports high static efficiency, helping move large air volumes at higher pressures while reducing energy consumption.
These fans are ideal for clean-air systems and may also be used in applications with light dust or particulate. Common uses include process ventilation, combustion air, forced draft, induced draft, and general industrial airflow.
As AirPro’s highest-efficiency fan technology, backward curved fans are available in four models across an expanded size range from 150 to 890. Each model is designed to support different flow and pressure requirements while maintaining the durability, performance, and application flexibility required in industrial environments.
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 85%
- Drive: belt and 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.
Backward Curved Blower & Fan Types
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.
BCHS
High-Volume, Single-Width
Our highest volume backward curved model, the BCHS is built for induced draft or forced draft applications that require large volumes of air.
BCMS
Medium-Volume, Single-Width
Designed for medium air volume applications, the BCMS achieves static efficiencies up to 85%, making it a dependable and efficient option for both induced and forced draft systems.
BCLS
Low-Volume, Single-Width
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 forced draft applications or pneumatic conveying induced draft applications.
BCNS
Narrow, Single-Width
Built for demanding industrial applications, the BCNS delivers high efficiency at low air volumes, reaching peak static pressures over 114″ wg and static efficiencies up to 81%. Its heavy-duty construction and single-thickness backward-curved blades ensure reliable performance under extreme conditions, and is also available in high-temperature designs. Available in sizes 300, 330, 365, 402, 660, and 730.
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 (backward curved, low-volume, single-width)
- Application: Spray drying; Food-grade
- Description: Size 402; Class X; Arr. 8V; 75 HP; 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.
Applications
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.
Combustion Air
Small, heavy-duty, high-efficiency fans are customized for combustion applications like boilers, burners, and others
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.
Additional Applications
Odor control, process heating, and dilution air are a few additional applications served by backward-curved technology.
