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B. VERTICALLY WITH NEW CHIMNEY SYSTEM
NOTE: Follow the vent manufacturer's instructions.
OPTION: In order to vent the furnace at the right location, a 45º elbow can be used to offset the pipe from the
exhaust outlet toward the appropriate location underneath the ceiling.
1. Always maintain 3" clearance from combustible materials. When passing through additional floors or ceilings,
always install firestop spacers.
2. After lining up for hole in roof, cut either a round or square hole in roof, always 3" larger all the way around pipe.
Install upper edge and sides of flashing under roofing materials, nail to the roof along upper edge. Do not nail
lower edge. Seal nail heads with non-hardening waterproof mastic.
3. Apply non-hardening, waterproof mastic where the storm collar will meet the vent. Slide storm collar down until it
sits on the flashing. Seal and install cap.
VERTICAL ROOF VENT
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
15
ATTIC
INSULATION
SHIELD
RADIATION SHIELD
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