Heatilator ST42A Installation Manual page 17

C. Termination Requirements
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Slanted Roofs
Chimney must
extend 3 ft (.9 m)
above the roof
Flat Roofs
Chimney must
extend 3 ft (.9 m)
above the roof
Multiple Chimney Locations
A
6 in. (minimum) up to 20 in.
152 mm/508 mm
20 in. and over
Figure 4.3 Multiple Chimney Locations
Chimney must extend 2 ft (.6 m)
above any portion of the roof or
adjacent structures within
10 ft (3 m) of the chimney
B
18 in. minimum
457 mm
0 in. minimum
Heatilator • ST42A Installation Manual • 4012-051 • Rev O • 02/22
Chimney must extend 2 ft (.6 m)
above any portion of the roof or
adjacent structures within
10 ft (3 m) of the chimney
Gas, Wood or Fuel Oil
Termination Cap
B
A *
Gas
Termination
Cap **
* If using decorative cap cover(s), this distance may need to be
increased. Refer to the installation instructions supplied with the
decorative cap cover.
** In a staggered installation with both gas and wood terminations, the
wood termination cap must be higher than the gas termination cap.
Wood
Minimum
(See
illustration
above)