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Heatilator • HEIR36-IFT, HEIR42-IFT, HEIR50-IFT Installation Manual • 2458-980 Rev. B • 8/17
14
* MINIMUM FRAMING DIMENSIONS USING 2 X 4 CONSTRUCTION
A
B
C
D
E
F
G
H
I
J
Rough
Opening
(Vent Pipe)
Rough
Opening
(Height)
Rough
Opening
(Depth)
Rough
Opening
(Width)
Clearance
to Ceiling
Combustible
Floor
Combustible
Flooring
Behind
Appliance
Sides of
Appliance
Front of
Appliance
HEIR36
Inches
10
56
24
59-1/2
52
0
See
Section
3.D.
1
1
36
Millimeters
254
1422
610
1511
1321
0
25
25
914
HEIR42
Inches
10
61
24
65-9/16
52
0
1
1
36
Millimeters
254
1549
610
1665
1321
0
25
25
914
HEIR50
Inches
10
65
24
73-9/16
52
0
1
1
36
Millimeters
254
1651
610
1868
1321
0
25
25
914
Figure 3.8 Clearances to Combustibles (2 X 4 Construction)
C
B
D
A
* Adjust framing dimensions for interior sheathing (such as sheetrock)
F
H
G
I
J
E
(FROM APPLIANCE
OPENING TO CEILING)
NOTE:
2 X 4 Header positioned vertically. See also Figure 3.7.