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5BDD20GB-A Downblast Roof Fan

20" Belt Drive Downblast Roof Fan, 1.5 HP, 115/230v, 1~

Item Number: 46939

• All ventilators are UL 705 Standard listed
• Durable spun aluminum construction with steel support braces
• Inlet temperatures up to 170°F
• Backward inclined aluminum fan wheel
• Equipped with a built-in bird screen to protect discharge
• Externally cooled motor compartment

Roof mounted belt drive downblast ventilators are designed to exhaust air out of commercial and industrial buildings. All models are for roof mounting only. Motor and wheel are easily detachable without removing ventilator from curb. Permanently lubricated ball bearings (5BDD10 - 5BDD13) and regreasable pillow block bearings (5BDD15 - 5BDD24).

Welded curb cap corners eliminate water entry into ducts or building. Ball bearing motors and variable pitch drives are packed separately when ordered with ventilators.

Technical parameters

Norminal data
Voltage (nominal) 120 V
Rated voltage 120 to 230 V
Frequency 60 Hz
Phase(s) 1~
Input power 1,286 W
Nominal power at shaft (P2) 1.5 hp
Input current 10.2 A
Impeller speed 1,081 r.p.m.
Air flow max 5,126 cfm
Temperature of transported air max 170 °F
Max temperature of transported air, when speed controlled 170 °F
Dimensions and weights
Weight 149 lb
Images Wiring - 5BDD20GB-A Downblast Roof Fan - Fantech
Images Dimensions - 5BDD20GB-A Downblast Roof Fan - Fantech
Model A B C D E

5BDD 10BB-A

19

25 3/4

22 7/8

3

1 1/2

5BDD 12CB-A

22

28

23 3/8

3

1 1/2

5BDD 13DB-A

22

29 3/4

24 5/8

3 1/4

1 1/2

5BDD 15DB-A

26

31 11/16

27 3/8

3 3/4

1 1/2

5BDD 16EB-A

26

33 11/16

27 3/4

4 3/16

1 1/2

5BDD 18FB-A

30

36

29 5/8

4 3/4

1 1/2

5BDD 20GB-A

30

38 1/4

30 1/4

5 1/4

1 1/2

5BDD 24GB-A

34

44 1/4

33

6 11/16

1 1/2

5BDD 24HX-A

34

44 1/4

33

6 11/16

1 1/2

Dimensions in inches

5ACC 01MS Motor Disc. Switch - Fantech Item Number: 47182 5ACC 01MS Motor Disc. Switch

NEMA I Disconnect Switch 2 Pole

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5ACC23RD Roof Mount Damper - Fantech Item Number: 47215 5ACC23RD Roof Mount Damper

23"x23" square damper

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5ACC28FS Fixed Non-Vented Curb - Fantech Item Number: 47221 5ACC28FS Fixed Non-Vented Curb

Fixed Curb 30" Sq Base Ventilator,8" H,25.5" Sq,28.5" Outer

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5ACC28FT Fixed Non-Vented Curb - Fantech Item Number: 47222 5ACC28FT Fixed Non-Vented Curb

Fixed Curb 30" Sq Base Ventilator,12" H,25.5" Sq,28.5" Outer

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