507324-01B
Page 2 of 32
Issue 1809
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Front View
C
23-1/2
(597)
25 (635)
D
3-1/4
(83)
23
(584)
14
(356)
15-1/2
(394)
23-7/8
(606)
30
(762)
26
(660)
19-1/2 (495)
28-3/8 (721)
B
33
(838)
A
1
NOTE
- C*20
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.
Model Number
A
B
C
D
BG801UH
in.
mm
in.
mm
in.
mm
in.
mm
045AP12
14-1/2
368
13-3/8
340
13
330
4-3/4
121
070AP12
090BP16
17-1/2
446
16-3/8
416
16
406
6-1/4
159
110CP16
21
533
19-7/8
504
19-1/2
495
8
203
110CP20
Unit Dimensions