Unit Dimensions; Front View - Lennox OHR23-105 Installation Instructions Manual

OHR23 Unit Dimensions − Inches (mm)
Model No. A B
in. 20-1/2 20-1/2
OHR23Q3- OHR23Q3-
105/120
mm 521 521
in. 23-1/2 23-1/2
OHR23Q5- OHR23Q5-
140/154
mm 597 597
D
END VIEW
F
E RETURN
AIR
OPENING
TOP VIEW
A
AIR FLOW
EXCHANGER
CLEAN OUT
8
C (203)
SUPPLY AIR OPENING
SIDE VIEW
C D E F
18 18 18 18
457 457 457 457
21 21 21 21 4-3/4
533 533 533 533
8
A
(203)
HEAT EX-
C
CHANGER
CLEAN OUT
SUPPLY
PORTS (3)
AIR
OPENING
(4) SPACER
LEGS
3/4
(19)
32-1/2
(826)
59
(1499)
HEAT
PORTS (3)
BURNER
3/4
(19)
SUPPLY AIR OPENING

FRONT VIEW

DOWNFLOW POSITION
G H
53 (1346)
3 10-1/4
76 260
4 KNOCKOUTS
11-3/8
(For Suspending)
121 289
3/4
(19)
BURNER
1
FLUE OUTLET
(25)
HORIZONTAL POSITION
OPTIONAL DOWNFLOW COMBUSTIBLE FLOOR BASE
B FRONT OF
FURNACE
105/120
16-1/4(413)
140/154
H
20-1/4(514)
FLUE
OUTLET
105/120
16-1/4(413)
140/154
20-1/4(514)
BURNER
D
Page 2
TOP VIEW
AIR
14-1/2
(368)
3-1/2
FLOW
(89)
G
FLUE OUTLET
59 (1499)
32-1/2 (826)
H
SIDE
VIEW
Additive Base Raises Furnace
3/4 in. (19 mm) Inch above Floor Level
F A
RETURN
AIR
3/4
(19)
E B
RETURN
AIR
SUPPLY
AIR DUCT
(Not
Furnished)
OPTIONAL
DOWNFLOW
ADDITIVE
BASE
COMBUSTIBLE
FLOOR