36 |
Vertical
Termination
Storm Collar
Flashing
Roofing nails
Elbow Strap
Vertical Termination
1.
Check “
I
nItIal
I
nstallatIon
- V
entIng
C
learanCes
”
for required clearances to combustibles when
passing through ceilings, walls, roofs, enclosures,
attic rafters, or other nearby combustible surfaces.
Do not pack air spaces with insulation.
2.
Set the fireplace in the desired location. Drop a
plumb bob down from the ceiling to the fireplace flue
exit and mark the location where the vent will penetrate
the ceiling. Drill a small hole at this point. Next, drop a
plumb bob from the roof to the hole and mark the spot
where the vent will penetrate the roof. Determine if
ceiling joists, roof rafters, or other framing will obstruct
the venting system. Relocate the fireplace or offset
the venting to avoid cutting load bearing members.
3.
To determine the length of pipe required, measure
room height, ceiling thickness, and vertical rise in an
attic or second story. Firestops are required at each
floor level beyond the first floor ceiling support/wall
thimble cover or cathedral ceiling support box. If an
offset is required to avoid obstructions, use a pair of
45 degree elbows. For proper support, use elbow
straps with offsets. Use wall straps for long vertical
runs. Attic insulation shield is required in attic.
4.
Measure roof pitch. Select the proper flashing and
storm collar and determine the height above the roof
(see Table). A non-corrosive pipe material must be used
for all exterior pipe lengths. Seal nail heads with silicone.
Roof Pitch
Minimum Height (H)
Feet
Meters
Flat to 7/12
1
0.3
Over 7/12 to 8/12
1.5
0.46
Over 8/12 to 9/12
2
0.61
Over 9/12 to 10/12
2.5
0.76
Over 10/12 to 11/12
3.25
0.99
Over 11/12 to 12/12
4
1.22
Over 12/12 to 14/12
5
1.52
Over 14/12 to 16/12
6
1.83
Over 16/12 to 18/12
7
2.13
Over 18/12 to 20/12
7.5
2.29
Over 20/12 to 21/12
8
2.44
Framing and Installation
Venting
Venting
