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Unit Dimensions
1 NOTE - C*20 and D*20 (5 Ton) size units installed in upflow
applications that require air volumes of 1800 cfm (850 L/s) or greater
must have one of the following:
1. Single side return air with transition, to accommodate 20 x 25 x 1
in. (508 x 635 x 25 mm) air filter.
2. Single side return air with optional RAB Return Air Base
3. Bottom return air.
4. Return air from both sides.
5. Bottom and one side return air.
2 Optional External Side Return Air Filter kit is not for use with
optional Return Air Base.
* Consider sizing requirements for optional IAQ equipment before
cutting side return opening.
A
B
3/4
C
(19)
1
Bottom Return
Air Opening
FRONT VIEW
Model
045-12
070-12
090-12
090-16
090-20
110-16
110-20
135-20
Page 2 of 60
9/16 (14)
2
OPTIONAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
33
(838)
14−3/4
(375)
16
(406)
5/8
(16)
3/4
(19)
A
in.
mm
17-1/2
448
21
533
24-1/2
622
1-7/8
24
(61)
20-3/4
(53)
20-3/8
(52)
15-1/2
(39)
3-1/4
(8)
B
in.
mm
16-3/8
416
19-7/8
505
23-3/8
594
Issue 2332
TOP VIEW
24-7/8
24-3/8
(5)
D
28-1/2
(72)
27-3/4
(70)
1-7/8 (5)
2-5/8 (7)
6-1/2 (17)
1-5/8 (4)
23
(58)
2 (5)
SIDE VIEW
C
in.
mm
16
406
19-1/2
495
23
584
(63)
(62)
19-1/2
(50)
14 (36)
D
in.
mm
7-5/8
194
9-3/8
238
11-1/8
283
508404-01
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