Use and Care Manual

507713-01Page 2 of 32 Issue 1623
GUH80A Unit Dimensions - inches (mm)
1
NOTE - 5C and 5D 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 lter.
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 lter 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
Model Number A B C D
GUH80A in. mm in. mm in. mm in. mm
045-3
14-1/2 368 13-3/8 340 13 330 4-3/4 121
070-2
070-3
090-3
17-1/2 446 16-3/8 416 16 406 6-1/4 159
090-4
110-4
21 533 19-7/8 504 19-1/2 495 8 203
110-5
135-5
24-1/2 622 23-3/8 546 23 584 9-3/4 248