Lennox G40UH Series User Manual

Page 2
G40UH(X) Unit Dimensions − inches (mm)
*Bottom Return
Air Opening
GAS PIPING INLET
(Either Side)
*Side Return
Air Opening
(Either Side)
*Bottom Return
Air Opening
FLUE OUTLET
(Top)
ELECTRICAL INLET
(Either Side)
ELECTRICAL INLET
(Either Side)
SUPPLY AIR
OPENING
AIR FLOW
FRONT VIEW SIDE VIEW
TOP VIEW
A
B 9/16 (14)
C
D
3/4 (19)
3/4 (19)
28−1/2
(724)
19−7/16
(494)
23−1/2
(597)
4−1/4
(108)
14 (356) Right
13−1/4 (337) Left
4−7/8 (124) Right
2−1/4 (57) Left
40
(1016)
3−3/4 (95)
4
(102)
1−15/16 (49)
23
(584)
14
(356)
9/16
(14)
3−3/4
(95)
3−1/4 (83) Right
8−1/8 (206) Left
**FLUE OUTLET
(Either Side)
TOP VIEW
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
16
(406)
14−3/4
(375)
5/8 (16)
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
23-3/4 (603)
25 (635)
**Flue outlet may be horizontal but furnace must be
vented vertically
Optional external side return air filter kit cannot be used
with the optional RAB Return Air Base.
*NOTE − 60C and 60D units that require air volumes
over 1800 cfm (850 L/s) must have one of the following:
1. Return air from single side with transition which will
accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm)
cleanable air filter. (Required to maintain proper air
velocity.)
2. Return air from single side with optional RAB Return
Air Base.
3. Return air from bottom.
4. Return air from both sides.
5. Return air from bottom and
one side.
Refer to Engineering Handbook for additional information.
Model No
A B C D
Model No.
in. mm in. mm in. mm in. mm
G40UH−24A−045,
G40UH−24A−070,
G40UH−36A−045,
G40UH−36A−070
14−1/2 368 13−3/8 340 13 330 4−1/2 114
G40UH−36B−090,
G40UH−48B−070,
G40UH−48B−090
17−1/2 446 16−3/8 416 16 406 6 152
G40UH−36B−110,
G40UH−48C−110,
G40UH−48C−135,
G40UH−60C−110
21 533 19−7/8 454 19−1/2 495 7−3/4 197
G40UH−60D−135
G40UH−60D−155
24−1/2 622 23−3/8 546 23 584 9−1/2 241

Lennox G40UH Series Specifications

General

Brand	Lennox
Model	G40UH Series
Category	Furnace
Language	English