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RGM Form 421, Mfg No. 150492, Page 3
3. Dimensions
Figure 1
Dimensions (inches)
Size A B C D E F G H J K L M
Nat Pro
75, 100
34-3/8 14-1/4 35-11/16 14-5/8 4-3/8 3-15/16 1/2 1/2 5/8 12-1/2 7-1/4 7-7/16 4-5/8
125, 140
34-3/8 17 35-11/16 17-3/8 4-3/8 3-15/16 1/2 1/2 5/8 15-1/4 7-1/4 7-7/16 6
170
34-3/8 19-3/4 35-11/16 20-1/8 4-3/8 3-15/16 1/2 1/2 5/8 18 7-1/4 7-7/16 7-3/8
200
34-3/8 22-1/2 35-11/16 22-7/8 4-3/8 3-15/16 1/2 1/2 5/8 20-3/4 7-1/4 7-7/16 8-3/4
225
34-3/8 25-1/4 35-11/16 25-5/8 4-3/8 4-15/16 1/2 1/2 1-3/8 23-1/2 7-1/4 7-7/16 10-1/8
250
34-3/8 28 35-11/16 28-3/8 7-1/8 4-15/16 1/2 1/2 1-3/8 26-1/4 7-1/4 7-7/16 11-1/2
300
34-3/8 33-1/2 38-1/8 33-7/8 9-7/8 5-15/16 3/4 1/2 1-3/8 31-3/4 9-9/16 7-5/8 13-7/8
350
34-3/8 39 38-1/8 39-3/8 12-5/8 5-15/16 3/4 1/2 1-3/8 37-1/4 9-9/16 7-5/8 16-5/8
400
34-3/8 44-1/2 38-1/8 44-7/8 15-3/8 5-15/16 3/4 1/2 1-3/8 42-3/4 9-9/16 7-5/8 19-3/8
Dimensions (mm)
Size A B C D E F G H J K L M
Nat Pro
75, 100
873 362 906 371 111 100 13 13 16 318 184 189 117
125, 140
873 432 906 441 111 100 13 13 16 387 184 189 152
170
873 502 906 511 111 100 13 13 16 457 184 189 187
200
873 572 906 581 111 100 13 13 16 527 184 189 222
225
873 641 906 651 111 125 13 13 35 597 184 189 257
250
873 711 906 721 181 125 13 13 35 667 184 189 292
300
873 851 968 860 251 151 19 13 35 806 243 194 352
350
873 991 968 1000 321 151 19 13 35 946 243 194 422
400
873 1130 968 1140 391 151 19 13 35 1086 243 194 492
D
(centerline of hangers)
M
J
(Duct width)
Combustion
Air Opening
4" (102mm)
Minimum unit
spacing
Limit
A
8-1/8"
(206mm)
18"
(457mm)
3/4" (19mm)
3/4" (19mm)
6-3/4"
(171mm)
Front View
Side View
Rear View
5"
(127mm)
16"
(406mm)
K
L
C
F
Airflow
Keep
clear for
service
29"
(737mm)
3-1/2"
(89mm)
View
port
(both
sides)
E
B
G = Gas
Connection
(not supply line)
Combustion
Air Opening
Electric Supply
H
26"
(660mm)