Big Fans [HVLS] / MonsterFans GD Series


MonsterFans GD Series

Geared-Drive HVLS Fan

The GD Series fan offers diameters ranging from 8ft – 24 ft [2.4m – 7.3m] and delivers maximum speeds of
53-105 RPM. Built with a Helical Inline Reducer motor providing whisper-quiet operation for sensitive applications, and a cool 6 MPH breeze for areas up to 230 ft.


  • Warehouses
  • Manufacturing
  • Distribution centers
  • Vehicle maintenance
  • Airplane hangars
  • Industrial applications


Our MonsterFans provide monster comfort by moving monster amounts of air volumes at a slow non-disruptive speed. See how Schwank MonsterFans work.

[Watch time 2 min]

MonsterFans GD Series highlights

Geared-Drive HVLS Fan

Discover our MonsterFans DNA


  • Helical Inline Reducer motor
  • Diameter 8–24 feet [2.4–7.3 meters]
  • 53-105 RPM
  • 5 airfoil modulating trailing edge blades
  • Unbreakable alloy hub [713 cast aluminum alloy]
  • Whisper-quiet operation with 62-63 dBA
  • Certified by UL and CSA


  • Lifetime warranty on blades, hub, and mounting system
  • 5-year warranty on motor, gearbox, and control panel


  • Minimal maintenance [recommended inspection every 20,000 hrs]
  • Five airfoil blades are larger at 10¼” wide for Monster air movement
  • Blade design offers a unique angle of attack up to 23°and angled up to 23°
  • Geared motor offers protection against dust, water, and vapors for indoor or outdoor use



MonsterFans GD Series resources

Explore product brochures, case studies & technical information.


Click on the image to view and download PDF.



See how our MonsterFans save energy for your heating system in the winter. When heating large buildings, heat naturally rises to the ceiling and gets wasted. With slow rotations, MonsterFans enable the warm air to start moving and spread out into the building. 

[Watch time 1 min]

Technical documents

Installation Manual

Electrical Manual (208-480V)

Electrical Manual (575V)

Remote Pad Manual (575V)

Touch Control Manual


Technical Spec

Oil Change Guide

Purlin Mount Installation

Standard Mount Installation

AutoCAD Drawings [DWG] 

AutoCAD Drawings [PDF]

Additional resources

Blog | Introducing MonsterFans by Schwank

Blog | MonsterFans Destratification with HVLS

Blog | MonsterFans Blade Strength

Get started

For more information or to purchase, please contact our heating experts


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If you have a general inquiry, please call us toll free (USA & Canada) or email our experts.

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