SQB Belt Drive Square Inline Centrifugal Duct Fan

In-line/Sidewall Duct Fan Series

In-line/Sidewall Duct Fans
TD-MIXVENT TD-SILENT PV-DEDPV PV-POWERVENT PRF SWF-SIDEWALL SMXD SMXD-HT SMXDK SMXDK-HT SQB SQD and eSQD CTB and CTBRHUL CFD
SQB Model

Model Features

  • Exhaust air up to 24,000 CFM in high static pressure applications up to 3-1/2" w.g.
  • Belt drives permit easy performance adjustments when needed
  • Ideal for applications where space is limited
  • Non-overloading backward inclined wheel for efficiency at higher static pressures
  • AMCA Air and Sound Licensed
  • cULus 705 Listed
  • This product meets the requirements of Buy American (2009) and Build America, Buy America (BABA), as part of IIJA (2022). Download letter here.

AMCA Air and Sound Licensed   cULus Listed BABA-ACT

Model Overview

SQB square in-line duct mounted fans are available in sizes 7 through 42, moving from 100 to over 24,000 CFM, with high static pressure capability up to 3-1/2". SQB units are the perfect selection for clean air applications where space is a leading consideration. The compact housing with removable access doors and side discharge can be mounted in any orientation. AMCA licensed performance and UL listing assure that you've made a reliable selection.

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

Size CFM Range Max SP
7 86 to 423 1-3/4"
8 331 to 1318 1-3/4"
10 436 to 2027 2"
12 769 to 3384 2"
15 1135 to 4421 2-1/4"
HP15 741 to 3539 3-1/2"
18 1443 to 6111 2-1/4"
HP18 1714 to 4240 3"
20 2028 to 7916 2-1/4"
HP20 1908 to 6248 2-3/4"
24 2395 to 11240 2-1/4"
HP24 3195 to 10996 3-1/2"
30 3879 to 15168 2-1/4"
HP30 3906 to 12632 3-1/2"
36 5189 to 18767 2"
HP36 5958 to 16117 2-1/2"
42 6669 to 24544 1-1/4"
Dimensional Drawing SQB
Size A B C
7 15" 23" 11-7/8"
8 15" 23" 11-7/8"
10 17" 23" 13-7/8"
12 21" 23" 17-7/8"
15 24" 30" 21-7/8"
18 28" 30" 23-7/8"
20 32" 34" 27-7/8"
24 39" 38" 34-7/8"
30 44" 40" 39-7/8"
36 52" 45" 47-7/8"
42 58" 53" 53-7/8"

Standard Accessories

External Grease Fittings  
Mounted and Wired Disconnect  
Side Discharge  
Belt Guard  
Motor Cover  
Inlet Guard  
Outlet Guard  
Hanging Bracket/Mounting Foot with Hanging Spring Isolator  
Hanging Spring Isolator  
Hanging Rubber in Shear Isolator  
Assorted Disconnects  
Heavy-duty Disconnect  
Backdraft Damper
Insulated Housing  

General Catalog Section
Typical Specification Sheet
Submittal
Instruction and Operation Manual

  • General/Clean Air
  • Spark Resistant
  • Offices/Common Areas