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SDB Belt Drive Centrifugal Downblast Roof Exhaust Fan

Centrifugal Roof & Wall Fan Series

SDB Model

Model Features

  • Exhaust air up to 31,563 CFM in high static pressure applications up to 1-3/4" 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
  • AMCA Air and Sound Licensed
  • cULus 705 Listed

AMCA Air and SoundcULus

Model Overview

The SDB belt drive fans are designed to exhaust air up to 31,563 CFM in high static pressure applications up to 1-3/4". The aluminum exterior provides an attractive appearance. Belt drive results in lower operating RPM and sound levels, making the Model SDB 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 mounting permits location near the area to be ventilated, allowing short duct runs and more efficient operation.

SDBs are primarily used for the exhaust of relatively clean air from a wide range of commercial, industrial and institutional environments such as manufacturing and assembly plants, office buildings, schools, hospitals, restaurants, athletic facilities and many others.

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

Size CFM Range Max SP
6 41 to 375 7/8"
7 44 to 547 7/8"
8 194 to 1,132 1"
10 244 to 1,422 1"
12 425 to 1,870 1-1/4"
14 802 to 3,525 1-1/2"
15 543 to 3,724 1-1/2"
16 1,275 to 4,135 1-1/2"
18 1,389 to 5,787 1-3/4"
20 1,728 to 6,259 1-3/4"
22 2,522 to 8,098 1"
24 2,503 to 9,287 1-1/4"
27 3,856 to 10,169 1"
30 4,336 to 15,782 1-1/2"
33 4,025 to 17,165 1-1/4"
36 6,385 to 19,560 1-1/4"
42 8,256 to 25,590 1-1/2"
48 10,456 to 31,563 1-1/4"
Dimensional Drawing for the SDB Model

Dimensional data is displayed in inches.

Size A B C D Roof Opening Curb O.D. Damper O.D.
6 18 30-1/8 25 3-3/8 13-1/2 16-1/2 12
7 18 30-1/8 25 3-3/8 13-1/2 16-1/2 12
8 18 30-1/8 25 3-3/8 13-1/2 16-1/2 12
10 18 30-1/8 25 3-3/8 13-1/2 16-1/2 12
12 20 31-11/16 27-5/8 3-7/8 15-1/2 18-1/2 14
14 20 31-11/16 27-5/8 3-7/8 15-1/2 18-1/2 14
15 24 32-1/2 32-7/8 4 19-1/2 22-1/2 18
16 24 32-1/2 32-7/8 4 19-1/2 22-1/2 18
18 30 36-3/8 39-3/16 4-5/8 25-1/2 28-1/2 24
20 30 38-5/16 45 6-1/8 25-1/2 28-1/2 24
22 30 38-5/16 45 6-1/8 25-1/2 28-1/2 24
24 36 46-5/8 49-3/8 6 31-1/2 34-1/2 30
27 36 49-1/16 49-3/8 8-1/2 31-1/2 34-1/2 30
30 42 50-1/4 56 7-3/8 37-1/2 40-1/2 36
33 42 50-1/4 56 7-3/8 37-1/2 40-1/2 36
36 42-5/16 48-7/8 64-1/4 7 37-1/2 40-1/2 36
42 54-1/4 54-7/8 71-3/16 11-1/2 49-1/2 52-1/2 48
48 54-1/4 58-1/8 78-3/16 12-7/8 49-1/2 52-1/2 48

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

Standard Accessories

Automatic Belt Tensioner  
Automatic (Gravity) Damper  
Backdraft Damper Submittal
Curb Hinge Arrangement  
Motor Operated Damper  
Roof Curb Submittal

Centrifugal Roof and Sidewall Brochure
General Catalog Section
Typical Specification Sheet
Submittal
IOM

SDB

  • Bathrooms
  • Dormitories
  • Garages
  • General/Clean Air
  • General (non-grease) Kitchen Areas
  • Manufacturing and Assembly Plants
  • Offices
  • Places of Worship
  • Schools
  • Spark Resistant
  • Warehouses
  • And More