DB Downblast Belt Drive Centrifugal Roof Exhaust Fan

DB Model

Model Features

  • Exhaust air up to 28,000 CFM in high static pressure applications up to 1-1/4" w.g.
  • Attractive spun aluminum exterior
  • Belt drives permit easy performance adjustments when needed
  • Non-overloading backward inclined wheel for efficiency at higher static pressures
  • cULus 705 Listed


Model Overview

Downblast belt drive fans are designed to exhaust air up to 28,000 CFM, with high static pressure capability up to 1-1/4". The belt drive results in lower operating RPM and sound levels, making the DB well suited to applications where quiet operation is important. Belt drives also permit 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 mounting permits short duct runs and more efficient operation.

DB's are primarily used for the exhaust of relatively clean air from a wide range of commercial, industrial and institutional environments.

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

Size CFM Range Max SP
36 3,321 to 18,840 1-1/4"
42 4,889 to 23,076 1"
48 5,912 to 27,224 1-1/4"
Dimensional Drawing for DB Models

Dimensional data is displayed in inches.

Size A B C D E F
36 58-3/8 37 42-1/2 10 41 2-1/2
42 73 40-1/2 55 10 54-5/8 2-1/2
48 73 40-1/2 55 13 54-5/8 2-1/2

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

Standard Accessories

Automatic Belt Tensioner  
Automatic Damper  
Curb Hinge Arrangement  
Motor Operated Damper  
Roof Curb Submittal

General Catalog Section
Typical Specification Sheet

  • General/Clean Air
  • Spark Resistant