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  9. Downblast Vent, Belt Drive, 21-1/2 In
Dayton Downblast Vent, Belt Drive, 21-1/2 In 7A661 - main

Downblast Vent, Belt Drive, 21-1/2 In

  • Mfr # 7A661

  • Zoro # G2992412

product price: $1,987.99
/ea
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Key Features

Item - Roof Ventilators
Downblast Ventilator
Drive Package With Motor Included
Yes
Duty Rating - Roof Ventilators
Standard
Drive Type - Roof Ventilators
Belt Drive
Mounting Location - Roof Ventilators
Roof
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Specifications

Product Information

MFR #
7A661
Zoro #
G2992412
UPC #
-
Country of Origin
Multiple

Dimensions

Base Size - Roof Ventilators
30 in x 30 in
Wheel Dia.
21 1/2 in
Dimension D
5 1/2 in
Base Length
30 in
Overall Height
36 1/8 in
Dimension C
34 3/8 in
Base Height
1 3/4 in
Shaft Dia. Wheel End
3/4 in
Overall Dia.
35 1/2 in
Base Width
30 in
Base Square Size - Roof Ventilators
30" x 30"
Dimension B
35 1/2 in
Dimension A
30 in
Housing Width
35.5 in
Housing Length
35.5 in
Damper Size
23 x 23 in
Overall Width
35 1/2 in
Propeller Shaft Diameter
3/4 in
Overall Length
35 1/2 in
Wheel Diameter
21 1/2 in
Overall Diameter
35 1/2 in

Details

Item - Roof Ventilators
Downblast Ventilator
Drive Package With Motor Included
Yes
Duty Rating - Roof Ventilators
Standard
Drive Type - Roof Ventilators
Belt Drive
Mounting Location - Roof Ventilators
Roof
Number of Speeds
1
Voltage - Roof Ventilators
208V AC/230V AC/460V AC
Motor HP - Roof Ventilators
1/2 hp
CFM @ 0.000-In. SP
4261
Sones @ 0.250-In. SP @ 5 Ft.
10.7
Includes
Drive Package, NEMA 1 Junction Box
Drive Type
Belt Drive
Motor HP
1/2
Recommended 12 In. Fixed Curb Item No.
4HX49
Sones @ 0.125-In. SP @ 5 Ft.
11.0
Recommended 8 In. Fixed Curb Item No.
4HX41
Drive Package Included
Yes
Phase
3
CFM @ 0.250-In. SP
3744
Max. BHP
0.55
Speed Controllable
No
Max. Inlet Temp.
180 Degrees
CFM @ 0.500-In. SP
3141
Adj. 6 3/8"H Roof Curb Stock No.
4c454
Motor Voltage
208/230/460
CFM @ 0.375-In. SP
3477
RPM
770
Wheel Material
Aluminum
Assembled/Unassembled
Unassembled
Agency Compliance
AMCA Sound & Air, UL/cUL 705
Sones @ 0.500-In. SP @ 5 Ft.
9.8
Mounting Location
Roof
Hz
60
CFM @ 0.625-In. SP
2643
CFM @ 0.125-In. SP
4013
Item
Centrifugal Downblast Roof Exhaust Fan
Adj. 12 3/8"H Roof Curb Stock No.
3C437
Housing Material
Aluminum
Wheel Type
Backward Inclined
Standards
AMCA Sound and Air, UL/cUL 705
Bearing Type
Regreasable Pillow Block
Exhaust Airflow @ 0.000 in SP
4,261 cfm
Application
Industrial and Commercial Applications
Sound Level
10.2 sones @ 0.375 in SP and 5 ft, 10.7 sones @ 0.250 in SP and 5 ft, 11.0 sones @ 0.125 in SP and 5 ft, 12.1 sones @ 0.000 in SP and 5 ft, 9.3 sones @ 0.625 in SP and 5 ft, 9.8 sones @ 0.500 in SP and 5 ft
Compatible Curb Manufacturer Part Number
2RB79, 2ZV83, 3C437, 4C454, 4HX41, 4HX49
Maximum Static Pressure
5/8 in wc
Frequency
60 Hz
Exhaust Airflow @ 0.500 in SP
3,141 cfm
Includes Drive Package
Yes
Exhaust Airflow @ 0.125 in SP
4,013 cfm
Safety Features
Birdscreen, Windband
Brake Horsepower
11/20 hp
High-Efficiency Motor
No
Exhaust Airflow @ 0.250 in SP
3,744 cfm
Features
Fully Rolled Windband Bead for Increased Stability and Easy Transport, NEMA 1 Junction Box Located in Motor Enclosure
Electrical Connection
Power Cord
Current
1.7 to 1.7/0.85 A
Nameplate Voltage
208-230/460V AC
For High-Static Pressure Applications
No
Maximum Inlet Air Temperature
180 Degrees F
Spark Resistant Construction Type
A
Housing Material Fabrication
Spun
Airflow @ 0.000 in SP
4,261 cfm
Assembly
Unassembled
Mount Type
Roof Curb
Resistance Properties
Weather Resistant
Motor Location
Out of Airstream
For Air Type
Clean Air
Motor Horsepower
1/2 hp
Base Shape
Square
Includes Motor
Yes
Exhaust Airflow @ 0.375 in SP
3,477 cfm
Motor Enclosure
Open Dripproof
Maximum Fan Speed
770 RPM
Motor Speed
1,725 RPM

Description

Centrifugal Downblast Roof Exhaust Fan, Drive Type Belt Drive, Assembly Unassembled, Wheel Diameter 21 1/2 in, Base Diameter Not Applicable, Base Length 30 in, Base Width 30 in, Base Shape Square, Nameplate Voltage 208-230/460V AC, Phase 3, Motor Horsepower 1/2 hp, Exhaust Airflow @ 0.000 in SP 4,261 cfm, For High-Static Pressure Applications No, High-Efficiency Motor No, For Air Type Clean Air, Includes Drive Package Yes, Includes Motor Yes, Mounting Location Roof

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