Upblast Direct Drive Centrifugal Roof/Sidewall Exhaust Fans

Spun Aluminum Centrifugal Fan Series


High Wind Tie-Down Kit Option Available

Model Features

  • Exhaust air up to 4,780 CFM in high static pressure applications up to 2-1/4" w.g.
  • Attractive spun aluminum exterior
  • Direct drive units have low sound levels and quiet operation
  • Curved non-overloading backward inclined wheel for efficiency at higher static pressures
  • Roof or sidewall mounting options
  • AMCA Air and Sound Licensed
  • cULus 705 or 762 Listed
  • Ecowatt® (STXDe and STXDeRHUL Models)
  • Miami-Dade NOA and Florida Product Approval Option Available
  • Listed with the Texas Department of Insurance under Product Evaluation RV-126 for wind load and windborne debris resistance per IRC/IBC 2018

AMCA Air and Sound LicensedcULus Listed Ecowat RegisteredMiami Dade Approved

Model Overview

Model STXD direct drive fans are designed to exhaust air up to 4,780 CFM in high static pressure applications to 2-1/4". The aluminum exterior provides an attractive appearance. The non-overloading backward inclined wheel with its higher static pressure capability makes this unit suitable for either ducted or nonducted applications. Its roof or wall mounting permits location near the area to be ventilated, allowing short duct runs and more efficient operation. Direct drive units use smaller diameter wheels with lower rpm's, resulting in low sound levels and quiet operation. They have no belts or fan bearings to maintain or adjust and consequently require very little maintenance.

Isolation of the motor from the air stream and the high velocity vertical (roof) or horizontal (wall) air discharge make the Model STXD ideally suited for the removal of dirty, contaminated and/or high temperature air from processes and buildings. Typical applications include restaurant hoods and similar kitchen exhaust ventilation, fume and smoke removal, laboratory fume hood exhaust and chemical process exhaust.

5-year fan housing warranty, 1-year motor warranty
STXD-RHUL units have 2-year fan housing warranty

Size CFM Range Max SP
6 56 to 308 3/4"
7 78 to 437 3/4"
8 182 to 935 7/8"
10 322 to 1,445 1"
12 470 to 1,918 1-1/4"
14 868 to 3,268 1-1/2"
15 800 to 3,997 2"
16 880 to 4,781 2-1/4"
18 1,098 to 4,272 1-1/4"


Select S-Series (Centrifugal Roof Fans) models are now hurricane and high wind certified for wind-borne debris impact resistance and wind load design pressures up to ±150 PSF.

Tie down kit

High Wind Tie-Down Kit

Non-flanged horizontal mount exhaust backdraft damper

  • Tie-downs
  • Fastened motor cover

Note: Additional accessories are available for certain products. Contact your S&P Representative for more information about these accessories.

Standard Accessories

Aluminum Grease Trough    
Automatic (Gravity) Damper    
Backdraft Damper  
Clip Lock Curb (Available for Non-Restaurant Models) Submittal  
Curb Cap Adaptor Submittal  
Curb Hinge Arrangement    
Grease Grabber    
Insect Screen    
Motor Operated Damper    
Roof Curb Submittal  
Self-Flashing Curb Submittal  
Solid State Speed Control    
Ventilation Gas Detectors Submittal IOM
Wall Mounting Kit Submittal
Wheel Cleaning Port    

Ecowatt® Accessories

Constant Pressure System    
Potentiometer Submittal  
EC Differential Pressure Control   IOM
EC Motor Speed Control    
ECM Multi-Speed Control   IOM
Centrifugal Roof and Sidewall Catalogue  
General Catalogue Section  
Ecowatt® Brochure
  • Restaurant Hoods / Kitchen Ventilation
  • Fume and Smoke Removal
  • Laboratory Fume Hoods
  • Chemical Process Exhaust