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Unit Dimensions
NOTE - 20 C/D (5 Ton) size units installed in upflow applications
1
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.
Optional External Side Return Air Filter kit is not for use with
2
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
F
R
O
N
T
Model
045-12
070-12
090-12
090-16
090-20
110-16
110-20
135-20
Page 2 of 58
9/16 (14)
2
OPTIONAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
14−3/4
(375)
16
(406)
5/8
(16)
3/4
(19)
V
E I
W
A
in.
mm
17-1/2
446
21
533
24-1/2
622
2 (51)
D
COMBUSTION
AIR INTAKE
2
OPTIONAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
1 (25)
Front Panel
6−9/16 (167)
Left
9 (229)
Right
12−5/8 (321)
(Either Side)
33
(838)
ELECTRICAL
INLET
(Either Side)
3−1/4
(83)
B
in.
mm
16-3/8
416
19-7/8
505
23-3/8
594
Issue 1724
EXHAUST AIR
3−3/8
OUTLET
(86)
SUPPLY AIR
OPENING
2-7/8
(73)
23−3/4
(603)
25
(635)
TOP VIEW
27−3/4
(705)
19−7/16
(494)
2 (51)
(Either Side)
GAS PIPING INLET
(Either Side)
CONDENSATE
TRAP CONNECTION
(Either Side)
6−1/2 (165)
(Either Side)
23
(584)
1
Side Return
Air Opening
(Either Side)
23−1/2
(597)
1
Bottom Return
Air Opening
S
D I
E
V
E I
W
C
in.
mm
16
406
19-1/2
495
23
584
9/16
(14)
1 − 1/2
(38)
14
(356)
1−15/16 (49)
D
in.
mm
7-5/8
194
9-3/8
238
11-1/8
283
507281-06
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