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506526-01Page 2 of 39 Issue 1031
Model
A
368
14-1/2
A801UH/80G1UH
B
C
in.
mm
in.
mm
in.
mm
340
13-3/8
330
13
090-12
135-20
533
21
504
19-7/8
495
19-1/2
622
24-1/2
546
23-3/8
584
23
D
in.
mm
248
9-3/4
203
8
121
4-3/4
070-08
090-16
110-16
110-20
070-12
045-12
045-08
110-12
446
17-1/2
416
16-3/8
406
16
159
6-1/4
A80UH & 80G1UH Unit Dimensions - inches (mm)
1
NOTE - 20C and 20D 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
Flue outlet may be horizontal but furnace must be vented
vertically.
3
Optional external side return air filter kit cannot be used with
the optional RAB Return Air Base.
* Consider sizing requirements for optional IAQ equipment before
cutting side return opening.
FRONT VIEW
SIDE VIEW