12
Matrix Installation and Operation Instructions
3.6 Outdoor Venting
Vent piping outside the building is permitted under the following
conditions:
o
The maximum length outside the building is 20 feet. (Outdoor
length must be included in the overall vent length calculation.)
o
All normal termination clearances are maintained.
o
All exterior exhaust vent pipes are insulated with 3.5”-ID, ½”-
thick, Closed Cell Foamed Polyolefin Tubing i.e., “
Tundra
Seal Plus”
or equivalent.
o
The pipe is supported every 24”
o
The exhaust and inlet are sloped back to the boiler ½”
elevation for every foot.
Supports every 24”
12” plus allowance above
grade for snow
Exhaust
Inlet
Gas Vent Directly Below
Keep Free of Obstructions
Apply Plate Here
Maximum of 20 feet
is permitted for
outside a building
using 3” pipe ONLY.
Figure 3.6 Outdoor Venting
