Greenheck Expands SQ Mixed Flow Inline Fan Line

December, 2022

New smaller sizes, side discharge and insulation options now available

Greenheck’s line of SQ direct drive mixed flow inline fans offering a unique combination of high efficiency, low sound, and ease of installation in a square housing design continues to expand and add enhancements. With the addition of sizes SQ-7 and SQ-9 covering lower CFM selections from 100 to 2,300 cfm, the SQ mixed flow line is now available in twelve sizes, 7-33, with performance ranges up to 27,800 cfm and up to 3 in. wg.

Greenheck SQ Mixed Flow Fan


A new side discharge option helps to reduce system effect, improves system performance, and reduces installation labor as fans are configurable with a variety of discharge options—inline, left, right, or any combination of the three. The new configurations also help to reduce the overall footprint of the fan and ductwork. An insulation option providing both noise reduction and condensation control is recommended for applications where fans are placed in acoustically-sensitive locations. Additional options and accessories are also available.


Model SQ is available with a single-phase or three-phase direct drive Vari-Green® motor up to 10 hp for improved energy efficiency and low maintenance. AMCA certified for Sound and Air Performance and Fan Energy Index (FEI), Greenheck SQ mixed flow square inline fans are ideal for indoor and outdoor supply, exhaust, return, or make-up air systems in clean air applications such as multifamily, offices, manufacturing, education and health care facilities.

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About Greenheck

Greenheck is a global leader in engineering and manufacturing air movement, control, conditioning, and distribution equipment. For 75 years, we have been committed to promoting the highest levels of indoor air quality by offering the widest range of ventilation products for commercial and institutional buildings. Through superior customer service, we continue our legacy of innovation as experts in air movement by connecting our mechanical representative partners and customers with the newest products. With our CAPS® product selection tool and HVAC University product education series, Greenheck offers technology and product knowledge to ensure that when you work with us, you are working with the easiest company to do business with.

To learn more, visit or contact Greenheck, P.O. Box 410, Schofield, WI 54476-0410, (715) 359-6171, FAX (715) 355-2399.