Remote Drive Upblast Propeller Roof Exhaust Fans for Heat and Smoke Removal

Roof Top Fan Series


Model Features

  • Exhaust air up to 52,000 CFM in static pressure applications up to 3/4" w.g.
  • Motor and drives are located outside of the exhaust airstream
  • Designed and tested for emergency heat and smoke removal
  • Successfully passed heat test of 1000°F for 15 minutes and 500°F for over 4 hours
  • Belt drives permit easy performance adjustments when needed
  • cULus 705 & 793 Listed

cULus Listed

Model Overview

UBSRD-HT and UBSRD-HT1 has been designed and tested for emergency heat and smoke removal. This design also lends itself to everyday non-emergency high capacity industrial and commercial roof exhaust applications. These fans successfully passed heat tests of 1000°F for fifteen (15) minutes, and 500⪚F for over four (4) hours by an independent testing agency. UBSRD-HT and UBSRD-HT1 exceeds I.R.I (Industrial Risk Insurers) guidelines and is UL-793 Listed as "Power Ventilator for Smoke Control Systems."

The heavy-gauge design allows for years of standard commercial use and the dependability required in a fire emergency. The upblast configuration exhausts heat and smoke high above the roof line aiding in the access and capabilities of firefighters. Unlike complete design dependence on gravity vents which are sometimes limited by air temperature and wind velocity, the UBSRD-HT and UBSRD-HT1 in conjunction with gravity vents, will more effectively remove smoke, hot air, and gases when used in a properly designed system. With the UBSRD-HT1 unit, in the event of electrical failure, the 165°F fusible link will activate the spring assisted damper doors to provide gravity ventilation. Fan CFM, sizing and location for both exhaust and supply air are an important part of the overall heat and smoke venting building design needs. Refer to I.R.I., NFPA (National Fire Protection Association), and local fire codes for help in proper system design. Final approval for the complete system design should be authorized by the local authority having jurisdiction.

Fan selections are available in 24, 30, 36, 42, 48, 54 and 60 inch sizes. Horsepower and CFM range to 52,000 CFM and 10HP. Units are tested in accordance with AMCA Standard 301 (sound) and AMCA 210 (air) in an AMCA certified laboratory. Every unit is completely assembled and factory tested for quality assurance prior to shipment.

1-year fan housing and 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"

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  
Propeller Blade Side Safety Guard  
General Catalogue Section
Typical Specification Sheet
Submittal (UBSRD-HT)
Submittal (UBSRD-HT1)
Instruction and Operation Manual
  • General / Clean Air
  • Contaminated Air
  • Smoke Control (UL)
  • High Temperature above 200°F