Holiday Announcement

On Wednesday, November 21st, please be informed that JencoFan’s USA Division will close at 2:00 PM EST in observance of Thanksgiving Day. Our offices will reopen and resume production on Monday, November 26th, during regular business hours found here. We wish everyone a safe and Happy Thanksgiving!

UBB and UBX Upblast Propeller Roof Exhaust Fans

Roof Propeller Fan Series

UBB and UBX Models

Model Features

  • Exhaust air up to 78,000 CFM in static pressure applications up to 1/2" w.g.
  • Straight-through airflow design results in maximum exhaust efficiency
  • Belt drives permit easy performance adjustments when needed
  • Direct drive units have low sound levels and quiet operation
  • cULus 705 Listed

cULus Listed

Model Overview

UUBB and UBX are high capacity roof mounted exhausters rated from 5,900 to 78,000 CFM. They are general ventilation units designed to economically remove large volumes of air, fumes, and vapors from commercial and industrial buildings such as warehouses, manufacturing and assembly plants, distribution centers, chemical plants, foundries and paper mills.

Straight-through airflow design results in maximum exhaust efficiency. During operation, high air flow velocity opens butterfly dampers and prevents rain or snow from entering. Dampers close and cover the venturi opening when the unit is not in use.

The roof-mounted location eliminates interference with processes and equipment inside the building. It also permits locating the exhauster over a source of heated or contaminated air, allowing direct upward venting to the outside, unlike wall mounted exhausters which may move contaminated air through adjacent workspaces.

Belt drive units usually operate more quietly and afford easier performance adjustments, while direct drive models require less maintenance.

2-year fan housing warranty, 1-year motor warranty

UBB Specifications

Size CFM Range Max SP
24 4800 to 10000 1/2"
30 3254 to 13411 1/2"
36 11062 to 19349 1/2"
42 16000 to 29700 1/2"
48 17600 to 44800 1/2"
54 24200 to 51800 1/2"
60 27800 to 61000 1/2"
72 40500 to 70800 3/8"

UBX Specifications

Size CFM Range Max SP
24 5200 to 11200 1/2"
30 7900 to 18600 1/2"
36 1200 to 27400 1/2"
42 13300 to 32800 1/2"
48 18600 to 45800 1/2"
54 19400 to 55600 1/2"
60 35100 to 57200 1/2"
72 44000 to 65500 3/8"
Dimensional Drawing UBB and UBX
Size A B C D E
24 30" 33" 16" 32" 24"
30 36" 36" 17" 38" 30"
36 42" 38" 17" 44" 36"
42 48" 41" 18" 50" 42"
48 54" 44" 22" 56" 48"
54 60" 47" 22" 62" 54"
60 66" 50" 22" 68" 60"
72 80" 56" 31" 82" 72"

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

Standard Accessories

Description  
Roof Curb  
Outlet Guard  
Disconnect Switches  
Magnetic Latches  
Heat/Smoke Vent  
Extended Grease Lines  

Description  
UBB and UBX Catalog Pages  
UBB Product Submittal  
UBX Product Submittal  
UBB and UBX Product IOM  

  • General/Clean Air
  • Contaminated Air