©Johnstone Supply eCatalog 216

VENTILATORS Downblast

Centrifugal Belt Drive Downblast Exhaust Ventilators • Designed for low to moderate static pressure

• Variable pitch motor sheaves allows for 25% speed/CFM reduction • Shipped completely assembled with motor and drive package • Power ratings (BHP) do not include drive losses Note: Also available as part part of our Shell Program - ask your store for details Performance shown is for installation type A: free inlet, free outlet. Performance ratings include the effects of birdscreens in the airstream. The sound ratings shown are loudness values in fan sones at 5-ft. (1.5M) in a hemispherical free field calculated per AMCA Standard 301. Values shown for ventilators listed are for installation type A: free inlet fan sone levels.

in industrial and commercial applications where steady rooftop exhaust is required • Roof mount applications only • Features spun aluminum housing construction, steel support braces, backward inclined aluminum wheel, externally cooled motor compartment, birdscreen, junction box, welded curb corners and maximum operating inlet temperatures up to 170°F • Open dripproof motors are factory wired with 6' pigtail; single-phase models 1 HP and smaller are wired 115V; three-phase models 2 HP and smaller are wired 220V, 3 HP and larger are wired 440V; voltage is field convertible

Sones @ 0.250" SP

CFM @ 0.000" SP

CFM @ 0.250" SP

CFM @ 0.500" SP

CFM @ 0.750" SP

CFM @ 1.250" SP OEM Replacement Motor

Shipping Wt. Lbs.

Each

Order # Mfg. #

HP RPM Wheel Diam. Max. BHP

Single-Phase 115/230V X90-789

5BDD10BB 1/4 1819 10-1/2" 5BDD12BB-A 1/4 1423 12-1/4" 5BDD12CB 1/3 1566 12-1/4" 5BDD13BB-A 1/4 1213 13-1/2" 5BDD13DB 1/2 1528 13-1/2" 5BDD15DB 1/2 1301 15" 5BDD15FB-A 1 1639 15" 5BDD16DB-A 1/2 1100 16-1/2" 5BDD16EB 3/4 1261 16-1/2" 5BDD18DB 1/2 928 18-1/4" 5BDD18FB 1 1169 18-1/4" 5BDD20DB 1/2 800 20" 5BDD20FB-A 1 1008 20" 5BDD20GB 1-1/2 1154 20" 5BDD24DB-A 1/2 577 24-1/2" 5BDD24FB-A 1 727 24-1/2" 5BDD24GB 1-1/2 832 24-1/2" 5BDD30FB-A 1 519 30" 5BDD15DX-A 1/2 1301 15" 5BDD16EX-A 3/4 1261 16-1/2" 5BDD18FX-A 1 1169 18-1/4" 5BDD18GX-A 1-1/2 1338 18-1/4" 5BDD18HX-A 2 1473 18-1/4" 5BDD20FX-A 1 1008 20" 5BDD20HX-A 2 1270 20" 5BDD24DX-A 1/2 577 24-1/2" 5BDD24FX-A 1 727 24-1/2" 5BDD24GX-A 1-1/2 832 24-1/2" 5BDD24HX 2 916 24-1/2" 5BDD30FX 1 519 30" 5BDD30HX-A 2 653 30" 5BDD36HX-A 2 470 36-1/2"

0.25 14.2 0.25 11.7 0.33 12.7 0.24 12.3 0.48 16.8

1,197 1,104 1,004 884 1,464 1,321 1,158 950

575

481477

71 81 84 93 99

2099.00 2745.00 2545.00 2945.00 2799.00 2845.00 3345.00 3545.00 3399.00 3645.00 3699.00 4499.00 4599.00 4299.00 5099.00 5145.00 5199.00 9999.00 3045.00 3745.00 3845.00 3799.00 4045.00 4399.00 4545.00 5099.00 5099.00 5199.00 5345.00 5445.00 10500.00 10500.00 12900.00 13500.00

X90-790 X90-791 X90-792 X90-793 X90-795 X90-797 X90-799 X90-801 X90-805 X90-807 X90-811 X90-813 X90-815 X90-818 X90-820 X90-822 X90-827 X90-808 X90-809 X90-810 X90-814 X90-817 X90-819 X90-821 X90-823 X90-824 X90-828 X90-829 X90-833 X90-802

— 481477

1,611 1,481 1,339 1,169 805

481478

1,672 1,500 1,279 1,009 — 481477

2,106 1,969 1,820 1,645 1,131

481479

0.5

15.2

2,587 2,402 2,190 1,939 — 481479 3,259 3,112 2,965 2,791 2,392 481488 2,825 2,597 2,330 1,999 — 481479 3,235 3,036 2,817 2,579 1,877 481489 3,432 3,120 2,754 2,264 — 481479 4,324 4,075 3,815 3,520 2,726 481488 3,817 3,406 2,942 2,220 — 481479 5,506 5,222 4,938 4,636 3,913 481487 4,938 4,233 3,253 — — 481479 6,222 5,692 5,069 4,266 — 481488 7,121 6,659 6,148 5,554 — 481487 8,150 7,188 6,084 — — 481488 2,587 2,402 2,190 1,939 — 481451 3,235 3,036 2,817 2,579 1,877 481474 3,432 3,120 2,754 2,264 — 481451 4,324 4,075 3,815 3,520 2,726 481468 4,949 4,732 4,515 4,268 3,712 481872 5,448 5,251 5,054 4,848 4,381 481880 6,060 5,802 5,544 5,275 4,685 481880 4,938 4,233 3,253 — — 481451 6,222 5,692 5,069 4,266 — 481468 2,121 6,659 6,148 5,554 — 481872 7,839 7,421 6,984 6,476 5,195 481880 8,150 7,188 6,084 — — 481468 10,254 9,493 8,708 7,826 — 481880 13,908 12,718 11,284 9,030 — 481880 18,850 17,972 17,094 16,023 13,469 481881 4,810 4,484 4,149 3,786 1,186 481488 4,810 4,484 4,149 3,786 1,186 481468

106 114 106 113 123 132 130 141 147 149 157 164 429 106 113 123 132 134 135 141 144 149 157 164 164 429 434 460 481

1

20

0.48 13.4 0.72 16.8

0.5

11

1

16.7 11.2 17.1

0.5

1

1.5

22

0.51 11.7 1.01 18 1.52 19.6 1.01 13

Three-Phase 208-220/440V X90-796

0.5

15.2

0.72 16.8

X90-806 5BDD18DX-A 1/2 928 18-1/4"

0.5

11

1

16.7

1.5

21

1.98 24

1

17.1

2

24

0.51 11.7 1.01 18 1.52 19.6 2.03 22 1.01 13

2

17.5

2.15 17.8 5.35 29

X90-834 5BDD36KX-A 5 637 36-1/2"

Dimensions (In.)

Optional Accessories

Roof Curbs Non-Vented Order #

Exhaust Damper Order #

Wheel Diam. (In.)

A

B

C

D 3 3

10-1/2 12-1/4 13-1/2 16-1/2 18-1/4 15

19 22 22 26 26 30 30 34 42 46

25-3/4

22-7/8 23-3/8 24-5/8 27-3/8 27-3/4 29-5/8 30-1/4

X89-850 X90-735 X89-854 X90-737 X89-854 X90-737 X89-856 X90-740 X89-856 X90-740 X90-739 X90-743 X90-739 X90-743 X90-742 X90-745 X90-749 X90-753 — X90-747

28

29-3/4

3-1/4 3-3/4 4-3/4 5-1/4 4-3/16 6-11/16 8-13/32

31-11/16 33-11/16 38-1/4 44-1/4 51-7/16 36

20

24-1/2

33

30

37-1/2 41-5/8

36-1/2

60

10-1/2

211

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