Brochure

B
D
C
A
1-1/4”
F
T (Hanger Bar Length)
Hanger
Bar
Combustion Air Collar (see
Technical Data for size)
Thermostat Connection
(30-45 horizontal:
60-400 vertical)
Vent Connection (see
Technical Data for size)
1/2” NPT External
Gas Connection
REAR
VIEW
TOP VIEW
3/8” - 16 Female
Thread - four
suspension points
in Hanger Bars
Direct Drive
Blower attached to
the Cabinet
- Sizes 30-75
Direct Drive
Blower with
Blower Back
on the Cabinet
-Sizes 100-125
Belt Drive Blower
with Blower Back
on the Cabinet
- Sizes 150-400
RIGHT SIDE VIEW
(Access Panel)
FRONT
VIEW
M
N
P
Q
R
S
G
L
K**
J
H**
2-1/2”
E*
NOTES: * Sizes 150-400 - Dimension E varies with motor selection and belt adjustment.
** Dimensions H and K are the heater suspension points.
DIMENSIONS
Model UDBS
±1/16" (2mm)
Size A B C D E* F G H** J K** L M N P Q R S T
30, 45 26 5/8 12 1/8 13 13/16 10 16 3/8 36 1/8 21 9/16 17 3/8 11/16 22 1/2 6 1/2 9 3/16 5 3/16 2 11/16 2 7/8 3 7/8 6 1/2 31
60 26 5/8 15 1/8 13 13/16 13 17 7/8 36 1/8 21 9/16 17 3/8 11/16 22 1/2 6 1/2 11 7/8 7 7/8 5 1/2 2 7/8 3 7/8 6 1/2 31
75 26 5/8 15 1/8 13 13/16 13 17 7/8 36 1/8 21 9/16 17 3/8 11/16 22 1/2 5 1/2 11 7/8 7 7/8 5 1/2 2 7/8 3 7/8 6 1/2 31
100 26 5/8 23 1/8 13 13/16 21 23 1/4 43 5/8 21 9/16 17 3/8 11/16 22 1/2 8 1/2 18 1/2 14 1/2 8 3/4 2 7/8 3 7/8 6 7/16 31
125 26 5/8 23 1/8 13 13/16 21 23 1/4 43 5/8 21 9/16 17 3/8 11/16 22 1/2 7 1/2 18 1/2 14 1/2 8 3/4 2 7/8 3 7/8 6 7/16 31
150, 175 38 1/8 20 1/8 23 16 30 9/16 60 1/8 35 3/8 25 5/8 1 5/16 24 1/2 3 7/8 13 1/2 8 1/2 5 7/16 4 1/4 6 1/2 8 1/4 42
200 38 1/8 20 1/8 23 16 30 9/16 60 1/8 35 3/8 25 5/8 1 5/16 24 1/2 3 7/8 14 9/16 9 9/16 5 7/16 4 5/16 6 1/2 8 5/16 42
225, 250 38 1/8 26 1/8 23 22 39 5/8 63 7/16 35 3/8 25 5/8 1 5/16 24 1/2 5 7/8 18 1/16 13 1/16 9 4 5/16 6 1/2 8 5/16 42
300, 350,
400
40 7/8 34 1/8 23 30 42 5/8 63 7/16 35 3/8 27 5/8 1 5/16 23 1/2 3 7/8 22 1/16 17 1/16
11
13/16
4 1/2 7 1/4 8 1/2 42
Size A B C D E* F G H** J K** L M N P Q R S T
30, 45 (676) 511 351 254 416 918 548 441 17 572 165 233 132 68 73 98 165 787
60 676 384 351 330 454 918 548 441 17 572 165 302 200 140 73 98 165 787
75 676 384 351 330 454 918 548 441 17 572 140 302 200 140 73 98 165 787
100 676 587 351 533 591 1108 548 441 17 572 216 470 368 222 73 98 164 787
125 676 587 351 533 594 1108 548 441 17 572 191 470 368 222 73 98 164 787
150, 175 968 511 584 406 776 1527 899 651 33 622 98 343 216 138 108 165 210 1067
200 968 511 584 406 776 1527 899 651 33 622 98 370 243 138 110 165 211 1067
225, 250 968 664 584 559 1006 1611 899 651 33 622 149 459 332 229 110 165 211 1067
300, 350,
400
1038 867 584 762 1083 1611 899 702 33 597 98 560 433 300 114 184 216 1067
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




RefertoReznorwebsitewww.RezSpec.comforventing/inlet
airrequirementsforReznorSeparatedCombustionUnits
CLEARANCES FROM COMBUSTIBLES
Size
Top
Flue
Connector
Access
Panel
H
Non-Access
Side Bottom
J
Rear
K
inches (mm) inches (mm) inches (mm) inches (mm) inches (mm) inches (mm)
30-125 6 (152) 6 (152) 18 (457) 24 (610) 1 (25) 18 (457)
150-400 14 (356) 6 (152) 18 (457) 24 (610) 1 (25) 18 (457)
H
Access Panel clearance is required for service clearance to controls
J
Suspend the heater so that the bottom is a minimum of 5’ (1.5M) above the oor.
K
Rear clearance is measured from the back of the blower.
Form RZ-C-UH (Version H) Page 13
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