Hearth and Home Technologies A42CH EN - Manual (Page 21)

Heatilator • A36C & A42C • 28396 Rev Y • 10/06 21
Slanted Roofs
Flat Roofs
Chimney must
extend 3 ft (.9 m)
above the roof
Chimney must extend 2 ft (.6 m)
above any portion of the roof
within 10 ft (3 m) of the chimney
Chimney must
extend 3 ft (.9 m)
above the roof
Chimney must extend 2 ft (.6 m)
above any portion of the roof
within 10 ft (3 m) of the chimney
Figure 6.1 Termination Requirements
Figure 6.3 Ceiling/Attic Construction
Fire Risk
• Must maintain 2 in. (51 mm) air clearance
to insulation and other combustible
materials.
WARNING
Gas Termination Wood & Fuel Oil Terminatio
A 6 in. (152 mm) 20 in. (508 mm)
Gas, Wood or Fuel
Oil Termination
20 in.
(508 mm)
(minimum) to
Perpendicular
Wall
(gas only)
18 in.
(457 mm)
A
Gas
Termination
Figure 6.2 Multiple Chimneys
6 6
Complete the Enclosure
A. Chimney Termination
Chimney Termination Requirements (See Figures 6.1 and 6.2)
• Must have a cap approved and listed for this fi replace system
• Must not be located where it will become plugged by snow or other material
• Must terminate at least 3 ft (914 mm) above the roof and at least 2 ft (610 mm) above any portion of the roof within 10 ft
(3.05 m)
• Must be located away from trees or other structures
Mark the Exit Point of the Roof
Locate the point where the chimney will exit the roof by plumbing down to the
center of the chimney. Drive a nail up through the roof to mark the center. See
Figure 6.3.
Cut Out the Hole in the Roof
Measure to either side of the nail and mark the 14-1/2 in. x 14-1/2 in.
(368 mm x 368 mm) opening required. This is measured on the horizontal;
actual length may be larger depending on the pitch of the roof. Cut out and
frame the opening. See Chapter 25 of the Uniform Building Code for roof
framing details.
Assemble the Chimney Sections Through the Roof
Continue to add chimney sections through the roof opening, maintaining at
least a 2 in. (51 mm) air space to combustible materials.
Install the Roof Flashing
If a roof fl ashing is to be used, install the roof fl ashing appropriate to the
roof pitch and install a round termination cap and storm collar following the
instructions shipped with the cap.