11
Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
Ceiling Firestop
13 ft. (3.96m)
min. straight
6 ft (1.83 m) max.
unsupported chimney
above roof
39 1/2 in. (1003 mm)
Effective Height
Thimble application
shown
Figure 4.1 Chimney Requirements
NOTICE: A maximum of two pairs of offsets and returns
may be used.
Minimum overall straight height
13 ft
3.96 m
Minimum height with single offset/
return
14.5 ft
4.42 m
Double offset/return minimum height
20 ft
6.1 m
Maximum height
90 ft
27.43 m
Maximum chimney length between an
offset and return
20 ft
6.1 m
Maximum distance between chimney
stabilizers
35 ft
10.67 m
Maximum unsupported chimney
length between the offset and return
6 ft
1.83 m
Maximum unsupported chimney
height above the fireplace
35 ft
10.67 m
Maximum unsupported chimney
above roof
6 ft
1.83 m
WARNING! Risk of Fire! You must maintain 2 in. (51 mm)
air space clearance to insulation and other combustible
materials around the chimney system. Failure to do so
may cause overheating and fire.
NOTICE
:
You must provide support for the pipe during
construction and check to be sure inadvertent loading has
not dislodged the chimney section from the fireplace or at
any chimney joint.
A. Chimney Requirements
Vertical distances are measured from the base of the
fireplace as shown in Figure 4.1.
4
Chimney and Termination Requirements
Table 4.2 Chimney Component Dimensions
Table 4.1 Chimney Requirements
HEIGHT OF CHIMNEY COMPONENTS
in.
mm
Chimney Stabilizer
SL3
4-3/4
121
Offsets/Returns
SL315
13-3/8
340
SL330
15-1/2
394
Chimney Sections*
SL306
4-3/4
121
SL312
10-3/4
273
SL318
16-3/4
425
SL324
22-3/4
578
SL336
34-3/4
883
SL348
46-3/4
1187
* Dimensions reflect effective height.
