Greenheck Fan Greenheck Air Performance and Specifications for BSQ and SQ Models
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Belt Drive Specifications

Model BSQ

Duct mounted supply, exhaust or return fans shall be of the centrifugal, belt driven, inline type. The fan housing shall be of a square design constructed of heavy-gauge galvanized steel or aluminum and shall include square duct mounting collars.

Fan construction shall include two removable access panels located perpendicular to the motor mounting panel. The access panels must be of sufficient size to permit easy access to all interior components.

The fan wheel shall be centrifugal backward inclined, constructed of aluminum and shall include a wheel cone carefully matched to the inlet cone for precise running tolerances. Wheels shall be statically and dynamically balanced.

Motors shall be heavy-duty ball bearing type carefully matched to the fan load and furnished at the specified voltage, phase, and enclosure. Motors and drives shall be mounted out of the airstream. Motors shall be readily accessible for maintenance.

Precision ground and polished fan shafts shall be mounted in permanently sealed, lubricated pillow block ball bearings. Bearings shall be selected for a minimum L10 life in excess of 100,000 hours (L50 average life in excess of 500,000 hours) at maximum cataloged operating speed.

Drives shall be sized for a minimum of 150 percent of driven horsepower.

Pulleys shall be of the fully machined cast iron type, keyed and securely attached to the wheel and motor shafts. Motor pulleys shall be adjustable for final system balancing.

A NEMA-1 disconnect switch shall be provided as standard, except with explosion resistant motors, where disconnects are optional. Factory wiring shall be provided from motor to the handy box.

Fan shall bear the AMCA Certified Ratings Seal for Sound and Air Performance.

Fan shall bear a permanently affixed manufacturer’s nameplate containing the model number and individual serial number for future identification.

Fan shall be model BSQ as manufactured by Greenheck Fan Corporation of Schofield, Wisconsin, USA.

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Contents Centrifugal Inline Fans Models SQ and BSQ Table of ContentsModel Comparison Standard Construction Features Drive Frame Vari-Green Advantages FeaturesVari-GreenOptions BenefitsTime of Day Demand Control Ventilation for Multistory BuildingsOptions and Accessories Model SQ Model Model BSQ Model Selection ProcedureFilter Options Discharge Configuration Discharge ConfigurationsSide Discharge 243⁄4 ModelBSQ SQ-BSQSQ-BSQ 13⁄8 51⁄2 63⁄4 25⁄8 Base Mount or Hanging IsolatorsModel BSQ 13⁄8 51⁄2 63⁄4 25⁄16 SQ-BSQ VG = Vari-Green Typical InstallationSQ 60-65- Direct Drive SQ 70-75- Direct Drive SQ 80-85- Direct Drive 090 Damper size = 12 x SQ 90-95- Direct Drive095 100 SQ 100 Direct Drive120 SQ 120 Direct Drive130 SQ 130 Direct Drive140 SQ 140 Direct Drive160 SQ 160 Direct Drive2486 BSQ 70 Belt Drive1530 BSQ 80 Belt Drive1550 BSQ 90 Belt Drive2691 2556 BSQ 100 Belt Drive2490 BSQ 120 Belt Drive1735 BSQ 130 Belt Drive130HP BSQ 130HP Belt Drive2770 7901615 1340 BSQ 140 Belt Drive1890 140HP BSQ 140HP Belt Drive2641 2270 1900 15302001 BSQ 160 Belt Drive160HP BSQ 160HP Belt Drive2321 1990180 BSQ 180 Belt Drive1010 180HP BSQ 180HP Belt Drive1385 1120 200 BSQ 200 Belt Drive1375 990200HP BSQ 200HP Belt Drive1602 1350240 BSQ 240 Belt Drive1070 730240HP BSQ 240HP Belt Drive1605 300HP BSQ 300 Belt Drive855 967 735 615 495 375770 560 BSQ 300HP Belt Drive360 BSQ 360 Belt Drive811 360HP BSQ 360HP Belt Drive880 775 590420 BSQ 420 Belt Drive670 Remote Dial Model SQLeed information Constant PressureModel BSQ Belt Drive SpecificationsBSQ-300HP and 360HP SQ-75 through 120 BSQ-70 throughThrough 180 SQ-60 through 130 BSQ-130 High Pressure BSQ-130HP through 240HP BSQ-300 through

SQ/BSQ specifications

The Greenheck Fan SQ/BSQ series represents a significant advancement in the realm of ventilation solutions, designed to cater to both commercial and industrial applications. With an emphasis on performance, efficiency, and reliability, these fans have become a go-to choice for engineers and contractors alike.

One of the main features of the SQ/BSQ series is their advanced airflow design. The fans are engineered with high-performance backward-inclined blades, which not only optimize airflow but also minimize noise levels, making them ideal for settings where quiet operation is essential. This design allows the SQ/BSQ fans to handle a wide range of static pressures, delivering consistent airflow even in varying conditions.

Another notable characteristic of the SQ/BSQ fans is their robust construction. Made with high-quality materials, these fans are built to withstand the rigors of industrial environments. The casings are typically constructed from galvanized steel, with optional coatings available for enhanced corrosion resistance. This durability ensures long-lasting performance, reducing the need for frequent replacements and maintenance.

Equipped with the latest motor technology, the SQ/BSQ series offers energy-efficient options that comply with various energy standards. The fans utilize a range of motor types, including premium efficiency and electronically commutated motors (ECM), which contribute to lower operating costs and reduced energy consumption. This focus on energy efficiency aligns with increasing regulatory requirements and environmental considerations.

The SQ/BSQ series also embraces advanced control technologies. Through the integration of variable frequency drives (VFD), users can achieve precise control over fan speed and airflow, allowing for better system optimization. This capability is particularly beneficial in applications where airflow demands fluctuate, ensuring that energy usage remains efficient.

Lastly, Greenheck has prioritized ease of installation and maintenance with the SQ/BSQ models. The fans are designed to facilitate quick installation, featuring accessible service points for maintenance tasks. This ease of access helps reduce downtime and improves overall operational efficiency.

In summary, the Greenheck Fan SQ/BSQ series combines advanced airflow design, robust construction, energy-efficient motor technology, and intelligent control options to deliver a comprehensive and reliable ventilation solution. Whether used in commercial buildings, warehouses, or industrial facilities, these fans stand out for their performance and versatility, making them a preferred choice in the ventilation market.
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