Remote Drive Upblast Propeller Roof Exhaust Fan

Roof Top Fan Series





Model Features

  • Exhaust air up to 67,000 CFM in static pressure applications up to 1" w.g.
  • Motor and drives are located outside of the exhaust airstream
  • UBSRD is suited for removal of heated or contaminated air
  • Capable of continuous operation exhausting air up to 200°F
  • Belt drives permit easy performance adjustments when needed
  • cULus 705 Listed

cULus Listed

Model Overview

Model UBSRD units are high capacity, belt driven roof mounted exhausters rated from 3,700 to 67,000 CFM. The motor and drives are located outside of the exhaust airstream, making these units especially suited for the removal of heated or contaminated air from commercial and industrial buildings or processes where these conditions exist. All models are capable of continuous operation exhausting air to 200°F.

The remote drive construction allows for easy rooftop belt and motor access for maintenance. For increased air performance (in clean conditions) with the same easy maintenance access, the UBSRD is available without the belt and bearing enclosures. Straight-through air flow 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 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 an wall mounted exhauster which may move contaminated air through adjacent work spaces.

The UBSRD-P is an excellent choice for applications that require access to the internal components of the fan from the roof, and do not need UL793 high temperature components. The UBSRD-P also has a highly efficient polypropylene propeller that can withstand most applications.

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


Size CFM Range Max SP
24L 4977 to 8800 5/8"
30L 7404 to 14235 1/2"
30H 11156 to 17664 3/4"
36L 6217 to 19128 1/2"
36H 12076 to 22599 3/4"
42L 11847 to 25056 1/2"
42H 18996 to 30440 3/4"
48L 15444 to 31937 5/8"
48H 24225 to 40214 3/4"
54L 16227 to 36726 1/2"
54H 22967 to 45565 3/4"
60L 18214 to 50459 5/8"
60H 27799 to 25173 3/4"


Size CFM Range Max SP
24 3,739 to 10,137 3/4"
30 5,160 to 16,049 1"
36 6,846 to 23,564 1"
42 10,526 to 35,033 1"
48 8,468 to 47,896 1"
54 15,138 to 52,973 1"
60 15,799 to 67,191 .875"

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

Roof Curb  
Outlet Guard  
Disconnect Switch  
Magnetic Latches  
Non-insulated Belt Cover  
Propeller Blade Side Safety Guard  
Extended Grease Lines  
General Catalogue Section
Typical Specification Sheet
Instruction and Operation Manual
  • General / Clean Air
  • Contaminated Air
  • High Temperature Above 200°F