47
Initial Installation
QUALIFIED INSTALLERS ONLY
Figure 68: Vertical Vent Termination
Step 4. The vent pipe must extend into the vent cap at least 1¼” (320 mm). Secure the connection
between the vent cap and the pipe by attaching the two (2) sheet metal straps, which extend
from the vent cap assembly to the outer wall of the vent pipe. Bend any remaining portion of
the strap back towards the vent cap.
Step 5. Position the horizontal vent termination in the center of the thimble and attach to the exterior
wall with the four screws provided. The arrow on the vent termination must be pointing up. Run
a bead of high-temp silicone around the edges of the vent cap to make a seal with the wall.
Ensure the proper clearances to combustibles have been maintained.
v
eRticaL
t
eRmination
:
Vertical
Termination
Storm Collar
Flashing
Roofing nails
Elbow Strap
Step 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.
Step 2. Set the appliance in the desired
location. Drop a plumb bob down
from the ceiling to the appliance 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 appliance or offset the venting to
avoid cutting load bearing members.
Step 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.
Step 4.
Measure roof pitch. Select the proper flashing and storm collar and determine the height above
the roof (see Figure 69). A non-corrosive pipe material must be used for all exterior pipe
lengths. Seal nail heads with silicone.
