Cambridge Engineering, Inc.
48
M-Series Technical Manual
REFERENCE
HEATER ROOF AND WALL OPENINGS
Wall Opening
1
Roof
Opening
2
Discharge
Inlet
Model
W
H
W
H
W
L
M110
18.25"
18.25"
32"
35.25"
19.25"
19.25"
M112
19.75"
19.75"
32"
35.25"
20.75"
20.75"
M115
22.75"
22.75"
46"
35.25"
23.5"
23.75"
M118
25.5"
25.5"
50"
55"
26.5"
26.5"
M120
29.5"
29.5"
56"
55"
30.5"
30.5"
M125
35"
35"
68"
71.75"
36"
36"
M130
41"
41"
89.75"
71.75"
42"
42"
M136
47"
47"
89.75
96.75"
48"
48"
M140
54"
54"
119.5"
101"
55"
55"
Discharge Opening
Discharge Duct Size
Model
W
L
W
L
M110
12.7"
13.6"
16.25"
16.25"
M112
12.9"
15.9"
17.75"
17.75"
M115
18.6"
15.9"
20.75"
20.75"
M118*
21.9"
18.7"
23.5"
23.5"
M120*
24.5"
24.7"
27.5"
27.5"
M125*
31.2"
31.2"
33"
33"
M130*
36.6"
36.6"
39"
39"
M136*
42.5"
42.8"
45"
45"
M140
50"
50"
52"
52"
*Applies to both horizontal and vertical mount
HEATER DISCHARGE DIMENSIONS
Wall Opening
1
Discharge
Inlet
Model
W
H
W
H
M118
25.5"
25.5"
69"
57.5"
M120
29.5"
29.5"
75"
57.5"
M125
35"
35"
81"
81.5"
M130
41"
41"
101.5"
81.5"
M136
47"
47"
107"
81.5"
1
Based on 2" added to both the length and width of the discharge duct
2
Based on 3" added to both the length and width of the discharge duct
Horizontal Mount
Vertical Mount
