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FURNACE SPECIFICATIONS - Upflow/Horizontal Models
27-3/4
24-3/4
19-3/4
25-3/4
1-9/16
22-13/16
15
7/8
23
1-1/4
FURNACE DIMENSIONS AND SHIPPING WEIGHTS
Model
Furnace
Number
Input
*RA-
(Btuh)
045(†)-08A
45,000
054(†)-12A
54,000
072(†)-12A
72,000
072(†)-12B
72,000
072(†)-16B
72,000
090(†)-12B
90,000
090(†)-16B
90,000
090(†)-20B
90,000
108(†)-16B
108,000
108(†)-20B
108,000
108(†)-20C
108,000
126(†)-20C
126,000
Note: †Can be C or N
Table 1. Furnace Dimensions and Shipping Weights
SAFETY INFORMATION
1. Use only with type of gas approved for this
furnace. Refer to the furnace rating plate.
2. Install this furnace only in a location and
position as specified on Table 3 of these
instructions.
3. Provide adequate combustion and
ventilation air to the furnace space as
specified on Pages 8 through 12.
4. Combustion products must be discharged
outdoors. Connect this furnace to an
approved vent system only, as specified
on Pages 9 through 11.
3-15/16
3-1/2
30-1/2
25-1/8
23
(Bottom Return Opening)
Figure 1. Unit Dimensions in Inches
A
B
(in.)
(in.)
14 1/4
12 3/4
14 1/4
12 3/4
14 1/4
12 3/4
19 3/4
18 1/4
19 3/4
18 1/4
19 3/4
18 1/4
19 3/4
18 1/4
19 3/4
18 1/4
19 3/4
18 1/4
19 3/4
18 1/4
22 1/2
21
22 1/2
21
C
B
34-5/8
27-7/8
23
D
A
Dimensions
C
D
Flue Outlet
(in.)
(in.)
(in.)
4
11 3/4
4
11 3/4
4
11 3/4
7 5/8
17 1/4
7 5/8
17 1/4
7 5/8
17 1/4
7 5/8
17 1/4
7 5/8
17 1/4
7 5/8
17 1/4
7 5/8
17 1/4
9
20
9
20
5. Never test for gas leaks with an open
flame. Use a commercially available soap
solution made specifically for the detection
of leaks to check all connections, as
specified on Page 14 of these instructions.
6. Always install furnace to operate within the
furnace's intended temperature-rise range
with a duct system which has an external
static pressure within the allowable range,
as specified on Table 2 of these
instructions. See furnace rating plate.
7. When a furnace is installed so that supply
ducts carry air circulated by the furnace to
areas outside the space containing the
furnace, the return air shall also be handled
25-3/4
1-9/16
3-1/2
7/8
22-13/16
23
Bottom Return
Shipping
Weight
(lbs)
4
88
4
94
4
96
4
108
4
115
4
115
4
120
4
130
4
125
4
130
4
135
4
137
3
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