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Roof & Attic Ventilation Fans
Downblast Exhaust & Supply Fans
Centrifugal Downblast Exhaust Fans
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Price

$300 - $400 $300 - $400 (1)
$400 - $500 $400 - $500 (1)
$500 - $600 $500 - $600 (1)
$600 - $700 $600 - $700 (8)
$700 - $800 $700 - $800 (6)
$800 - $900 $800 - $900 (6)
$900 - $1000 (4)

$1000 - $1500 (10)

$1500 - $2000 (10)

$2000 - $2500 (7)

$2500 - $3000 (4)

$3500 - $4000 (1)

$4500 - $5000 (1)

$5000 & Above (3)
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Standards

AMCA Sound and Air, CSA, UL/cUL 705 AMCA Sound and Air, CSA, UL/cUL 705 (23)
AMCA Sound and Air, CSA, UL/cUL 705 AMCA Sound and Air, CSA, UL/cUL 705 (5)
AMCA Sound and Air, UL/cUL 705 AMCA Sound and Air, UL/cUL 705 (22)
AMCA Sound and Air, UL/cUL 705 AMCA Sound and Air, UL/cUL 705 (12)

Includes Drive Package

Drive Package Included Drive Package Included (38)
Drive Package Not Included Drive Package Not Included (20)
Yes Yes (1)

High-Efficiency Motor

High-Efficiency Motor High-Efficiency Motor (11)
No No (1)
No High-Efficiency Motor No High-Efficiency Motor (25)

Base Shape

Square Square (17)
Square Square (46)

Assembly

Assembled Assembled (36)
Unassembled Unassembled (22)

Airflow @ 0.000 in SP

203 cfm 203 cfm (1)
374 cfm 374 cfm (1)
431 cfm 431 cfm (1)
495 cfm 495 cfm (1)
571 cfm 571 cfm (1)
717 cfm 717 cfm (1)
768 cfm (1)

855 cfm (1)

864 cfm (1)

966 cfm (1)

1,043 cfm (1)

1,059 cfm (1)

1,098 cfm (1)

1,462 cfm (2)

1,618 cfm (1)

1,742 cfm (1)

1,813 cfm (1)

1,994 cfm (1)

2,093 cfm (2)

2,448 cfm (3)

2,540 cfm (1)

2,875 cfm (2)

3,249 cfm (1)

3,500 cfm (2)

4,433 cfm (2)

4,608 cfm (1)

6,032 cfm (2)

9,719 cfm (1)

12,311 cfm (1)

18,322 cfm (1)
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Wheel Diameter

8 in 8 in (1)
8 in 8 in (2)
10 1/2 in 10 1/2 in (1)
8 1/4 in 8 1/4 in (2)
11 in 11 in (4)
10 1/2 in 10 1/2 in (1)
11 in (6)

13 in (1)

13 3/4 in (1)

14 in (1)

14 3/4 in (4)

13 in (4)

13 1/4 in (2)

13 3/4 in (3)

14 in (1)

18 1/2 in (2)

16 3/4 in (5)

18 in (2)

18 1/2 in (2)

26 in (1)

30 in (1)

21 in (1)

21 1/2 in (2)

24 in (2)

30 in (1)

30 1/2 in (2)

33 in (1)

36 in (2)

42 in (1)

50 in (1)
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Phase

1 1 (12)
1 1 (21)
3 3 (6)

Number of Speeds

1 1 (38)
1 1 (8)
3 3 (3)
3 3 (2)
Variable Variable (4)
Variable Variable (7)

Maximum Inlet Air Temperature

130 Degrees F 130 Degrees F (1)
130 Degrees F 130 Degrees F (29)
180 Degrees F 180 Degrees F (31)

Exhaust Airflow @ 0.000 in SP

203 cfm 203 cfm (1)
374 cfm 374 cfm (1)
431 cfm 431 cfm (1)
495 cfm 495 cfm (1)
571 cfm 571 cfm (1)
717 cfm 717 cfm (1)
768 cfm (1)

855 cfm (1)

864 cfm (1)

966 cfm (1)

1,043 cfm (1)

1,059 cfm (1)

1,098 cfm (1)

1,383 cfm (1)

1,462 cfm (2)

1,618 cfm (3)

1,742 cfm (1)

1,813 cfm (1)

1,994 cfm (1)

2,093 cfm (1)

2,412 cfm (2)

2,448 cfm (1)

2,540 cfm (1)

3,150 cfm (2)

3,249 cfm (1)

4,433 cfm (2)

4,608 cfm (2)

6,032 cfm (2)

9,719 cfm (1)

12,311 cfm (1)

18,322 cfm (1)
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Overall Height

13 7/8 in 13 7/8 in (2)
16 3/8 in 16 3/8 in (2)
16 3/8 in 16 3/8 in (3)
25 1/2 in 25 1/2 in (8)
25 1/2 in 25 1/2 in (10)
26 5/8 in 26 5/8 in (1)
26 5/8 in 26 5/8 in (4)
27 1/8 in 27 1/8 in (2)
27 1/8 in 27 1/8 in (3)
29 in 29 in (3)
29 3/4 in 29 3/4 in (4)
36 1/8 in 36 1/8 in (2)
36 1/8 in 36 1/8 in (4)
37 3/4 in 37 3/4 in (2)
37 3/4 in 37 3/4 in (3)
40 1/8 in 40 1/8 in (3)
40 1/4 in 40 1/4 in (3)
45 3/4 in 45 3/4 in (1)
52 1/2 in 52 1/2 in (1)

For High-Static Pressure Applications

For High-Static Pressure Applications For High-Static Pressure Applications (3)
Not For High-Static Pressure Applications Not For High-Static Pressure Applications (54)

Drive Type

Belt Drive Belt Drive (6)
Belt Drive Belt Drive (26)
Direct Drive Direct Drive (11)
Direct Drive Direct Drive (19)

Maximum Static Pressure ?

1/4 in wc 1/4 in wc (3)
3/8 in wc 3/8 in wc (2)
1/2 in wc 1/2 in wc (4)
5/8 in wc 5/8 in wc (4)
3/4 in wc 3/4 in wc (1)
7/8 in wc 7/8 in wc (4)
1 in wc 1 in wc (5)
1 1/4 in wc 1 1/4 in wc (7)
1 1/2 in wc 1 1/2 in wc (19)
1 3/4 in wc 1 3/4 in wc (4)
2 in wc 2 in wc (4)
2 1/4 in wc 2 1/4 in wc (1)
3 in wc 3 in wc (1)

Exhaust Airflow @ 0.500 in SP

237 cfm 237 cfm (1)
283 cfm 283 cfm (1)
473 cfm 473 cfm (1)
507 cfm 507 cfm (1)
600 cfm 600 cfm (1)
623 cfm 623 cfm (1)
719 cfm (1)

1,008 cfm (1)

1,211 cfm (2)

1,250 cfm (2)

1,471 cfm (1)

1,490 cfm (1)

1,596 cfm (1)

1,623 cfm (1)

1,871 cfm (2)

2,220 cfm (2)

2,566 cfm (2)

2,615 cfm (1)

2,858 cfm (2)

3,980 cfm (2)

4,179 cfm (1)

5,301 cfm (2)

7,952 cfm (1)

10,997 cfm (1)

16,711 cfm (1)
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Motor Enclosure

Open Air Over Open Air Over (3)
Open Dripproof Open Dripproof (7)
Open Air Over Open Air Over (7)
Open Dripproof Open Dripproof (12)
Totally Enclosed Fan Cooled Totally Enclosed Fan Cooled (2)

Overall Width

19 3/8 in 19 3/8 in (2)
21 3/4 in 21 3/4 in (4)
21 3/4 in 21 3/4 in (2)
24 3/8 in 24 3/8 in (6)
24 3/8 in 24 3/8 in (4)
24 7/8 in 24 7/8 in (4)
24 7/8 in (1)

25 3/8 in (2)

27 1/4 in (2)

28 3/8 in (6)

28 3/8 in (6)

34 3/8 in (1)

34 3/8 in (1)

35 1/2 in (7)

35 1/2 in (1)

36 in (2)

38 3/8 in (2)

38 1/2 in (2)

44 in (1)

50 in (2)

50 3/4 in (1)
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Overall Length

19 3/8 in 19 3/8 in (2)
21 3/4 in 21 3/4 in (4)
21 3/4 in 21 3/4 in (2)
24 3/8 in 24 3/8 in (10)
24 3/8 in 24 3/8 in (5)
25 3/8 in 25 3/8 in (1)
28 3/8 in (10)

28 3/8 in (5)

35 1/2 in (5)

35 1/2 in (2)

42 3/4 in (2)

50 in (2)

50 in (2)

58 3/8 in (1)

58 3/4 in (1)

65 1/4 in (1)

83 in (1)
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Nameplate Voltage

115/208 to 230V AC 115/208 to 230V AC (5)
115/230V AC 115/230V AC (3)
115V AC 115V AC (23)
208 to 230/460V AC 208 to 230/460V AC (3)
208 to 230V AC 208 to 230V AC (1)
208-230V AC 208-230V AC (2)

Motor Horsepower

1/15 hp 1/15 hp (1)
1/60 hp 1/60 hp (1)
1/30 hp 1/30 hp (1)
1/20 hp 1/20 hp (1)
1/8 hp 1/8 hp (1)
1/6 hp 1/6 hp (1)
1/4 hp (3)

1/2 hp (1)

1/8 hp (3)

1/6 hp (3)

3/4 hp (4)

1 hp (1)

1/4 hp (2)

1/3 hp (1)

1/2 hp (4)

3/4 hp (3)

1 hp (3)

1 1/2 hp (3)

2 hp (1)

3 hp (1)

5 hp (1)
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Overall Height

Done

Maximum Static Pressure

Done

This is the maximum static pressure in inches of water column that these fans can overcome.

Centrifugal Downblast Exhaust Fans

Centrifugal downblast exhaust fans run quieter than axial fans making them better suited for occupied spaces. They exhaust air towards the mounting surface, aiding in weather resistance. Their fan wheel is designed to produce higher static pressures and moves a lower volume of air than axial fans.

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 33 IN WHEEL, CLEAN AIR

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 33 IN WHEEL, CLEAN AIR
Item # GFN5EFJ0
Mfr. Model # 5EFJ0

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 13 IN WHEEL, CLEAN AIR

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 13 IN WHEEL, CLEAN AIR
Item # GFN16D540
Mfr. Model # 16D540

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 21½ IN WHEEL, 6,032 CFM

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 21½ IN WHEEL, 6,032 CFM
Item # GFN3GY71
Mfr. Model # 3GY71

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 16¾ IN WHEEL, 3,249 CFM

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 16¾ IN WHEEL, 3,249 CFM
Item # GFN3HFL7
Mfr. Model # 3HFL7

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 30½ IN WHEEL, 9,719 CFM

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 30½ IN WHEEL, 9,719 CFM
Item # GFN3HFL8
Mfr. Model # 3HFL8

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 24 IN WHEEL, CLEAN AIR

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 24 IN WHEEL, CLEAN AIR
Item # GFN5EFH8
Mfr. Model # 5EFH8

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 18½ IN WHEEL, 4,608 CFM

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 18½ IN WHEEL, 4,608 CFM
Item # GFN3GY70
Mfr. Model # 3GY70

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Web Price : $2,920.50 / EACH

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 11 IN WHEEL, CLEAN AIR

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 11 IN WHEEL, CLEAN AIR
Item # GFN16D539
Mfr. Model # 16D539

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Web Price : $653.53 / EACH

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 13¾ IN WHEEL, CLEAN AIR

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 13¾ IN WHEEL, CLEAN AIR
Item # GFN16D541
Mfr. Model # 16D541

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Web Price : $756.28 / EACH

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DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 11 IN WHEEL, CLEAN AIR
Item # GFN4YU92
Mfr. Model # 4YU92

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Web Price : $613.49 / EACH

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 36 IN WHEEL, 18,322 CFM, 3

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 36 IN WHEEL, 18,322 CFM, 3
Item # GFN3HFL9
Mfr. Model # 3HFL9

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Web Price : $6,869.39 / EACH

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 30½ IN WHEEL, 12,311 CFM

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, DRIVE PACK, 30½ IN WHEEL, 12,311 CFM
Item # GFN3GY69
Mfr. Model # 3GY69

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Web Price : $5,031.58 / EACH

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 16¾ IN WHEEL, CLEAN AIR

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 16¾ IN WHEEL, CLEAN AIR
Item # GFN16D543
Mfr. Model # 16D543

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Web Price : $849.86 / EACH

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 50 IN WHEEL, CLEAN AIR

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 50 IN WHEEL, CLEAN AIR
Item # GFN4YY12
Mfr. Model # 4YY12

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Web Price : $6,024.91 / EACH

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CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 42 IN WHEEL, CLEAN AIR

DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 42 IN WHEEL, CLEAN AIR
Item # GFN5EFJ1
Mfr. Model # 5EFJ1

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Web Price : $3,964.08 / EACH

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DAYTON
CENTRIFUGAL DOWNBLAST ROOF EXHAUST FAN, BELT DRIVE, 16¾ IN WHEEL, CLEAN AIR
Item # GFN4YU96
Mfr. Model # 4YU96

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Web Price : $886.44 / EACH

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