Lennox International Inc G50UH-36C-110, G50UH-48C-110, G50UH-60D-135, G50UH-36B-090 Page

1 NOTE - 60C and 60D size units that require air volumes	3-3/4(95)-I_ 1
over 1800 cfm (850 L/s) 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. Required to maintain proper air velocity across the filter.

2.Single side return air with optional RAB Return Air Base

3. Bottom	return	air.					SUPPLY		AIR
4. Return	air from	both sides.			FLUE OUTLET		OPENING
5. Bottom and one side return air.					(Top)
See Blower Performance Tables for additional information.
					1OPTIONAL
					EXTERNAL
2 Flue outlet may be horizontal			but furnace	must be	SIDE RETURN		23-3/4 (603)
vented vertically					AIR FILTER KIT
					(Either Side)	I_1	25	(635)	=
3 Optional	External	Side Return	Air Filter Kit is not for use
with the optional RAB Return Air Base.							TOP	VIEW
					TOP	VIEW	28-1/2
	,_	A -_			3-1/4 (83) Right
							(724)
					8-1/8 (206) Left				9/16
		B _	4-9/16	(14)			r--
	I		I
								iE OUTLET
							(Either Side)

/" ........... h r	h ::::::::h f
		13-1/4 (337) Left
	3 OPTIONAL
	EXTERNAL
	SIDE RETURN
	AIR FILTER KIT
__	(Either Side)	4-7/8 (124) Right
__	40	2-1/4 (57) Left -I_
....	(1016)

,,i

AiR FLOW

			!1
		5/8	(16)
1 Bottom	Return
Air Opening
FRONT	VIEW
Model No.		A		B
	in.	mm	in.	mm
G50UH-24A-045,
G50UH-24A-070,	14-1/2	368	13-3/8	340
G50UH-36A-070
G50UH-36B-090,	17-1/2	446	16-3/8	416
G50UH-48B-090
G50UH-36C-110,
G50UH-48C-110,	21	533	19-7/8	504
G50UH-48C-135,
G50UH-60C-110
G50UH-60D-135,	24-1/2	622	23-3/8	546
G50UH-60D-155

ELECTRICAL INLET

(Either Side)

oGAS PIPING INLET

	(Either	Side)
	ELECTRICAL INLET
OW	(Either	Side)
'
I

[102	(584)
4	23

1 OPTIONAL 14

LRETURN CUTOUT (3_6)

(Either Side)

1-15/16 (49)

23 -1/2v

4-1/4	(597)
	1 Bottom Return

(108)Air Opening

SIDE VIEW

	C		D
in.	mm	in.	mm
13	330	4-1/2	114
16	406	6	152
19-1/2	495	7-3/4	197
23	584	9-1/2	241

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