3
Firebox, Hearth, Framing Dimensions and Clearances
A. Firebox Dimensions
Dimensions are actual firebox dimensions. Use for reference only. For framing dimensions and clearances refer to page 8.
Figure 3.1 Firebox Dimensions
B
4 in
(102 mm)
27 in
(686 mm)
3 in
(76 mm)
34 in
(864 mm)
A
20 in
(508 mm)
15-7/8 in
(403 mm)
5-3/4 in
(146 mm)
5-3/4 in
(146 mm)
15-7/8 in
(403 mm)
2 in
(51 mm)
7-3/4 in
(197 mm)
2 in
(50 mm)
9-3/8 in
(238 mm)
32"
36"
42"
A 32 in (813 mm) 36 in (914 mm) 42 in (1067 mm)
B 38 in (965 mm) 42 in (1067 mm) 48 in (1219 mm)
Gas Access
Above Hearth
Outside Air
Electrical Access
Wall Switch
Strain Relief
Outside
Air
Gas Access
Above Hearth
Gas Access
Below Hearth
6
Monessen • ACUF32/36/42 Installation Manual • 4136-901 • Rev A • 01/21
