Inline Fans (Models SQ and BSQ)
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Centrifugal Inline Fans Direct and Belt Drive

Centrifugal Square Inline Duct Fans Greenheck Fan Corporation certifies the model SQ and BSQ fans shown herein are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and Publication 311 and comply with the requirements of the AMCA Certified Ratings Program. The certified ratings for models SQ and BSQ are shown on pages 15 to 45. US LISTED Listed for Electrical (UL/cUL 705) all electrical connections must be made by a qualified electrician. Enjoy Greenheck's extraordinary service, before, during and after the...

Models SQ and BSQ Centrifugal Square Inline Duct Fans Model Comparison Airow Drive Type Impeller Type Mixed Flow High Temp (above 200°F ) Roof Curb Spark Resistant Ceiling Mounted Relative Cost Maximum Static Pressure (in. wg) Greenheck’s model SQ and BSQ centrifugal inline fans feature a unique combination of installation exibility, rugged construction, ease of service, high efciency and low sound levels. These compact inline fans are the ideal selection for indoor clean air applications including intake, exhaust, return or make-up air systems where space is a prime consideration. The need...

Standard Construction Features Model SQ Direct Drive

Standard Construction Features 1 Cabinet Construction The fan housing is constructed of rigid structural members and formed galvanized steel panels. (Aluminum construction is optional in SQ sizes 60-160 and in BSQ sizes 70-300). 2 Drive Frame Constructed from heavy-gauge steel. 3 Wheel An aluminum, backward inclined, nonoverloading centrifugal wheel is utilized to deliver maximum efciency. Each wheel is statically and dynamically balanced. 4 Duct Collars Inlet and discharge duct collars are provided for easy duct connection. The square design provides a larger discharge area than tubular...

Vari-Green® Options Vari-Green® Motor - Model SQ Greenheck’s electronically commutated (EC) Vari-Green (VG) motor combines motor technology, controllability and energy-efciency into one single low maintenance unit and is the industry’s rst fully controllable motor. When combined with Greenheck’s SQ fans, all the CFM and static pressure ranges of a belt drive can be attained with the benets of a direct drive. 1. Dial on Motor Control - A potentiometer (dial on motor control) is mounted on the motor for easy speed adjustment for system balance. Simply turn the dial; there are no belts and...

Vari-Green® Options components for variable volume. Vari-Green® Controls Transformer - Provides 24V power from the existing line voltage at the fan to the Vari-Green motor and controls. Dual voltage primary (120/240V) transformer provided with the fan. Remote Dial - Allows for remote, manual airow adjustments. Wall plate with dial may be mounted in a standard 2x4 inch electrical junction box. Two Speed Control with Integral Transformer Control allows motor rpm to be set at two independent speeds (high or low). Meets minimum airow requirements with the ability to bump up to high speed in an...

ALUMINUM CONSTRUCTION - Aluminum construction is available for all direct drive sizes 60160 and belt drive sizes 70-300. Some drive frame components may still be of galvanized construction to maintain structural integrity. INLET AND OUTLET GUARDS - Inlet and outlet guards provide protection for non-ducted applications. Guards are fabricated of welded wire on a galvanized steel frame. They are easily removed for maintenance and inspection. BELT DRIVE MOTOR COVER AND BELT GUARD For belt-driven fans, combination motor cover and belt guards constructed of galvanized steel are available for...

Filter Options The lter box is designed to provide a compact and convenient clean air solution. Factory-assembled as a single unit, this fan eliminates the costly process of designing, fabricating and installing special remote lter box assemblies. Both the fan and lter section feature removable access panels on both sides to remove and replace lters, making fan maintenance simple and fast. Model Selection Procedure 1. Calculate system pressure drop and cfm requirements (not including lters). 2. Make a preliminary model size selection. 3. Calculate a lter pressure drop (P) for the...

Discharge Configurations The side discharge option helps to reduce system effect. It will increase performance and reduce installation labor. The most notable is reducing system effects. Note: The gure 1 example shows the air being discharged into the corner. It will take several duct lengths before the airow becomes laminar or smooth again after making the turn. In gure 2, the fan is placed in the corner using a side discharge. In this conguration the air ow pattern at discharge is smooth and supports a more predictable system. Remember the duct length on the discharge side, should be...

Side Discharge Access Door Left Side Discharge Left Side Discharge Access Door Inline Discharge Inline Discharge Right Side Discharge SQ Side Discharge Duct Openings Unit Size Right Side Discharge BSQ Side Discharge Duct Openings Unit Size All dimensions in inches (millimeters). All dimensions in inches (millimeters).

Horizontal and Vertical Mounting Options All SQ and BSQ fan models can be mounted horizontally, vertically or at an angle. For ease of installation, knockouts are provided at each location where mounting brackets are shown in gures 6, 7 and 8. Optional brackets are universally adjustable to mount in any of these locations. NOTE: Hanging rails by others Figure 7 Horizontal Hanging or Base Mount With a hanging mount, the motor may be located on either top or bottom. The base mount allows top motor location only. Both options provide access panels on two sides. Figure 6 Horizontal Hanging or...

Base Mount or Hanging Isolators Standing Neoprene Isolator Standing Spring Isolator Complete isolation kits are available with either neoprene or spring isolators and are sized to match the weight of the specied fan size. The base isolator support brackets are designed to permit mounting of the fan with the motor located on top or either side. The hanging isolator support brackets are designed to permit mounting of the fan with the motor located on top, bottom or side. Note: Hanging rods to be supplied by others. Hanging Neoprene Isolator Model SQ 60-75 SQ 80-95 BSQ 70-90 SQ-BSQ 100 SQ-BSQ...