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8.13 Common Side Wall Horizontal Venting (Category III)
Note:
A continuous section of type B-vent may only be used to pass through the outside wall or outside of the
building. Horizontal venting (Category III) does not allow the use of type B-vent inside of the space.
TOP VIEW
Vent Terminal
Tjernlund VH1-6 or Equivalent
Outside Wall
Sweeping “T” Connection
(by others)
6" (15 cm) Single Wall Pipe
Vent Adapter
4" (10 cm) Single Wall Pipe
Vent Adapter
Vent Terminal
Tjernlund VH1-6 or Equivalent
Vent Adapter
4" (10 cm) Single Wall Pipe
4" (10 cm) Single Wall Pipe
Vent Adapter
Sweeping “Y” Connection
(by others)
6" (15 cm) Single Wall Pipe
Outside Wall
Description
Vent Terminal 6 in. (15 cm)
Requirements:
• Maximum of two heaters can be commonly vented through a side wall.
• Heaters must be of the same BTU output.
• Heaters must be controlled by a common thermostat.
Note:
It is required that all vent pipes and connectors be fastened together with sheet metal screws and sealed
with high temperature silicone sealant approved for at least 550 °F (288 °C) (supplied by others). The installer
must perform a leak test on the complete venting system. A solution of soap and water should be used to test
the venting system.
Summary of Contents for IRH
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