STXB-HT2 and STXB-HT High Temperature Upblast Belt Drive Centrifugal Roof Exhaust Fans

Centrifugal Roof & Wall Fan Series

Centrifugal Roof & Wall Fans
SDBD and SDBDe SDB STXD, STXDe, and STXDeRHUL STXB, STXB-RHUL, and STXB-HP STXB-HT2 and STXB-HT LPD and LPD-SF CWD
STXB Model for All Variants

Model Features

  • Curved non-overloading backward inclined wheel for efficiency at higher static pressures
  • The STXB-HT2 has a steel wheel, and the STXB-HT unit has an aluminum wheel
  • The STXB-HT2 can exhaust air up to 19,716 CFM in high static pressure applications up to 2-3/4" w.g.
  • The STXB-HT can exhaust air up to 37,920 CFM in static pressure applications up to 3"
  • Attractive spun aluminum exterior
  • Belt drives permit easy performance adjustments when needed
  • Increased shafts and bearings to accommodate the heavier wheel and high temperature operation on the STXB-HT2
  • Heavier gauge steel components to compensate for additional weight and temperature requirements on the STXB-HT2
  • AMCA Air and Sound Licensed
  • cULus 705 and 793 Listed

AMCA Air and SoundcULus

Model Overview

The STXB is now available with the UL Smoke Control Options (HT2 and HT). These fans can provide emergency heat and smoke ventilation in the event of a fire, which can provide valuable time to people exiting or emergency personnel. The HT2 has a steel wheel and is certified to exhaust heat and smoke in emergencies [500°F (260°C) for 4 hours and 1,000°F (538°C) for 15 minutes]. The HT has an aluminum wheel and is certified to exhaust heat and smoke in emergencies [500°F (260°C) for 4 hours]

STXB-HT2 and STXB-HT units have 2-year fan housing warranty

STXB-HT2

Size CFM Range Max SP
24 2,609 to 8,736 2"
27 3,155 to 12,323 1-3/4"
30 1,789 to 18,658 2-3/4"
33 4,431 to 20,237 2-1/4"
36 5,477 to 22,749 3"

STXB-HT

Size CFM Range Max SP
15 439 to 3,684 2-1/2"
16 603 to 3,975 2-1/4"
18 1,297 to 5,589 2-1/2"
20 1,305 to 6,552 2-1/2"
22 1,656 to 8,648 1-3/4"
24 2,609 to 8,736 2"
27 3,155 to 12,323 1-3/4"
30 1,789 to 18,658 2-3/4"
33 4,431 to 20,237 2-1/4"
36 5,477 to 22,749 3"
42 8,263 to 29,052 1-1/2"
48 7,124 to 37,920 1-1/2"
Dimensional Drawing for the STXB-HT2 model and All Variants

Dimensional data is displayed in inches.
*Approximate unit weight includes an average cataloged motor, drives, and no crating.

Size A B C D Roof
Opening		 Curb
O.D.		 Average Ship
Wt. Lbs.*
STXB-HT2		 Average Ship
Wt. Lbs.*
STXB-HT
15 24 31-1/2 36-1/2 26-5/8 19-1/2 22-1/2 - 159
16 24 31-1/2 36-1/2 26-5/8 19-1/2 22-1/2 - 166
18 30 35-3/4 42-5/8 30-1/2 25-1/2 28-1/2 - 230
20 30 38-5/8 46-7/16 30-1/2 25-1/2 28-1/2 - 233
22 30 38-5/8 46-7/16 33-5/16 25-1/2 28-1/2 - 233
24 36 49-1/8 50-1/2 37-1/2 31-1/2 34-1/2 435 385
27 36 51-5/8 61-5/16 41-1/2 31-1/2 34-1/2 478 413
30 42 52-5/16 65-7/16 42-1/4 37-1/2 40-1/2 531 503
33 42 52-5/16 65-7/16 42-1/4 37-1/2 40-1/2 540 505
36 42-5/16 50-11/16 64-1/4 44-1/4 37-1/2 40-1/2 640 592
42 54-1/4 56-15/16 76-1/8 48-3/16 49-1/2 52-1/2 - 779
48 54-1/4 60-3/16 80-7/8 52-3/8 49-1/2 52-1/2 - 869

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

Standard Accessories

Aluminum Grease Trough    
Curb Cap Adaptor Submittal  
Grease Grabber    
Roof Curb Submittal  
Self-Flashing Curb Submittal  
Ventilation Gas Detectors Submittal IOM

Product Line Overview
Centrifugal Roof and Sidewall Catalog
Flyer (STXB-HT2)
Flyer (STXB-HT)
Submittal
IOM

  • Warehouses
  • Stairwells
  • Manufacturing Facilities
  • Fume and Smoke Removal
  • Laboratory Fume Hoods
  • Chemical Process Exhaust