Dimensional Data; Model Number Code - Greenheck Centrifugal Roof Exhaust Fans NYB Brochure & Specs

Dimensional Data &

Model Number Code

Model Number Code
The model number code is designed to completely identify the fan. The correct code letters must be
specified to designate the correct construction. The remainder of the model number is determined by
the size and performance.
Model
NYD - Direct Drive
NYB - Belt Drive
4 4
B
A

Dimensional Data

Model A B
NYD-75 19 30 ⁄
(483) 3 (781)
4
NYD-90 19 30 ⁄
(483) 3 (781)
4
NYD/NYB-100 22 35 ⁄
(559) 1 (902)
2
NYD-120 24 37
(610) (940)
NYD-130 24 37
(610) (940)
NYD/NYB-140 26 41 ⁄
(660) 1 (1054)
2
NYB-180 30 45
(762) (1143)
NYB-240 34 52 ⁄
(864) 1 (1334)
2
All dimensions in inches (millimeters).
NYD - 120 - A
Fan Size
75 through 240
C
2 1/2 in.
(64 mm)
C Damper Square
20 ⁄ 10
1 (521) (254)
2
20 ⁄ 10
1 (521) (254)
2
25 12
(635) (305)
23 ⁄ 14
1 (587) (356)
8
23 ⁄ 14
1 (587) (356)
8
26 ⁄ 16
7 (683) (406)
8
32 ⁄ 18
5 (829) (457)
8
38 ⁄ 24
5 (981) (610)
8
Motor RPM
A = 1725
B = 1140
Motor HP
4 = 1/4
3 = 1/3
5 = 1/2
for Direct Drive
for Belt Drive
7 = 3/4
10 = 1
15 = 11/2