STXB, STXBRHUL, and STXBHP Upblast Belt Drive Centrifugal Roof/Sidewall Exhaust Fans
Spun Aluminum Centrifugal Fan Series
Model Features
- Exhaust air up to 37,920 CFM in high static pressure applications up to 3" w.g.
- Attractive spun aluminum exterior
- Belt drives permit easy performance adjustments when needed
- Curved non-overloading backward inclined wheel for efficiency at higher static pressures
- Roof or sidewall mounting options
- AMCA Air and Sound Licensed
- cULus 705 and 762 Listed
- Miami-Dade NOA and Florida Product Approval Option Available Download letter here.
- Listed with the Texas Department of Insurance under Product Evaluation RV-126 for wind load and windborne debris resistance per IRC/IBC 2018
Model Overview
STXB and STXBRHUL Upblast Belt Drive Centrifugal Roof/Sidewall Exhaust Fans are designed to exhaust air up to 37,920 CFM in high static pressure applications to 3". The aluminum exterior provides an attractive appearance. Belt drive results in lower operating RPM and sound levels, making the Series STXB well suited to applications where quiet operation is important. Belt drive also permits easy performance adjustments when needed to balance the total ventilation system. The non-overloading backward inclined wheel with its higher static pressure capability makes this unit suitable for either ducted or non-ducted applications. Its roof or sidewall mounting options permit location near the area to be ventilated, allowing short duct runs and more efficient operation.
Isolation of motor and drive components from the air stream and, the high-velocity vertical air discharge make the Series STXB 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.
For grease removal applications the fan must be installed per NFPA 96 and with a 40" discharge height and hinged access base.
5-year fan housing warranty, 1-year motor warranty
STXBRHUL units have 2-year fan housing warranty
STXB Specifications
| Size | Max HP | CFM Range | Max SP | Avg. Ship Weight (lbs) |
| Size | Max HP | CFM Range | Max SP | Avg. Ship Weight (lbs) |
| 8 | 1/3 HP | 201 to 1,128 | 1" | 123 |
| 10 | 1/3 HP | 348 to 1,468 | 1" | 123 |
| 12 | 1/2 HP | 318 to 1,989 | 1-1/4" | 137 |
| 14 | 1 HP | 808 to 3,334 | 1-1/2" | 144 |
| 15 | 1 HP | 439 to 3,684 | 2-1/2" | 159 |
| 16 | 1 HP | 603 to 3,975 | 2-1/4" | 166 |
| 18 | 2 HP | 1,297 to 5,589 | 2-1/2" | 230 |
| 20 | 3 HP | 1,305 to 6,552 | 2-1/2" | 233 |
| 22 | 3 HP | 1,656 to 8,648 | 1-3/4" | 233 |
| 24 | 3 HP | 2,609 to 8,736 | 2" | 385 |
| 27 | 3 HP | 3,155 to 12,323 | 1-3/4" | 413 |
| 30 | 7-1/2 HP | 1,789 to 18,658 | 2-3/4" | 503 |
| 33 | 7-1/2 HP | 4,431 to 20,237 | 2-1/4" | 505 |
| 36 | 7-1/2 HP | 5,477 to 22,749 | 3" | 592 |
| 42 | 7-1/2 HP | 8,263 to 29,052 | 1-1/2" | 779 |
| 48 | 10 HP | 7,124 to 37,920 | 1-1/2" | 869 |
Dimensional data is displayed in inches.
| Size | A | B | C | D | Roof Opening | Curb O.D. | Damper O.D. |
| 8 | 18 | 29-5/16 | 28-5/8 | 24-5/16 | 13-1/2 | 16-1/2 | 12 |
| 10 | 18 | 29-5/16 | 28-5/8 | 24-5/16 | 13-1/2 | 16-1/2 | 12 |
| 12 | 20 | 30-7/8 | 31-5/16 | 25-15/16 | 15-1/2 | 18-1/2 | 14 |
| 14 | 20 | 30-7/8 | 31-5/16 | 25-15/16 | 15-1/2 | 18-1/2 | 14 |
| 15 | 24 | 31-1/2 | 36-1/2 | 26-5/8 | 19-1/2 | 22-1/2 | 18 |
| 16 | 24 | 31-1/2 | 36-1/2 | 26-5/8 | 19-1/2 | 22-1/2 | 18 |
| 18 | 30 | 35-3/4 | 42-5/8 | 30-1/2 | 25-1/2 | 28-1/2 | 24 |
| 20 | 30 | 38-5/8 | 46-7/16 | 30-1/2 | 25-1/2 | 28-1/2 | 24 |
| 22 | 30 | 38-5/8 | 46-7/16 | 33-5/16 | 25-1/2 | 28-1/2 | 24 |
| 24 | 36 | 49-1/8 | 50-1/2 | 37-1/2 | 31-1/2 | 34-1/2 | 30 |
| 27 | 36 | 51-5/8 | 61-5/16 | 41-1/2 | 31-1/2 | 34-1/2 | 30 |
| 30 | 42 | 52-5/16 | 65-7/16 | 42-1/4 | 37-1/2 | 40-1/2 | 36 |
| 33 | 42 | 52-5/16 | 65-7/16 | 42-1/4 | 37-1/2 | 40-1/2 | 36 |
| 36 | 42-5/16 | 50-11/16 | 64-1/4 | 44-1/4 | 37-1/2 | 40-1/2 | 36 |
| 42 | 54-1/4 | 56-15/16 | 76-1/8 | 48-3/16 | 49-1/2 | 52-1/2 | 48 |
| 48 | 54-1/4 | 60-3/16 | 80-7/8 | 52-3/8 | 49-1/2 | 52-1/2 | 48 |
STXB and STXB-RHUL Kits
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.
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 Belt Tensioner | ||
| Automatic Damper | ||
| Backdraft Damper | Submittal | |
| Clip Lock Curb (Available for Non-Restaurant Models) | Submittal | |
| Curb Cap Adaptor | Submittal | |
| Curb Hinge Arrangement | ||
| Ecowatt® Drive | ||
| Grease Grabber | ||
| Insect Screen | ||
| Motor Operated Damper | ||
| Roof Curb | Submittal | |
| Self-Flashing Curb | Submittal | |
| Ventilation Gas Detectors | Submittal | IOM |
| Wall Mounting Kit | Submittal | |
| Wheel Cleaning Port |
- Restaurant Hoods / Kitchen Ventilation
- Fume and Smoke Removal
- Laboratory Fume Hoods
- Chemical Process Exhaust