VENT INSTALLATION
FOR HORIZONTAL TERMINATION | Inside Corner Detail |
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E | C |
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L | V | Fixed |
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Closed |
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| Operable | V | ble | Closed |
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Vent Terminal | A Air Supply Inlet | Area Where Terminals Not Permitted |
Figure 12 - Horizontal Vent Termination Location
MINIMUM DISTANCES
A = Clearance above the grade, a veranda, porch, deck, or balcony [*12" (305mm) minimum]. B = Clearance to window or door that may be opened [*12" (305mm) minimum].
C = Clearance to permanently closed window [*minimum 12" (305mm) recommended to prevent condensation on window]
D = Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of two (2) feet (610mm) from the centerline of the terminal [18" (457mm) minimum].
E = Clearance to unventilated soffits [12" (305mm) minimum]. Clearance to vinyl soffit [30" (762mm)]. F = Clearance to an outside corner. See Figure 12.
G = Clearance to an inside corner. See Figure 12.
H= *Not to be installed above a gas meter/regulator assembly within three (3) feet (914mm) horizontally from the centerline of the regulator.
I= Clearance to service regulator vent outlet [*3' (914mm) minimum].
J= Clearance to
K= Clearance to a mechanical air supply inlet [*6' (1829mm) minimum].
L= Clearance above a paved sidewalk or paved driveway located on public property [**7' (2133mm) minimum].
M= Clearance under veranda, porch, deck, or balcony. See Figure 13, page 17. [For Canada *12" (305mm) minimum***].
*As specified in CAN/CGA B149 Installation Codes. Note: Local codes or regulations may require different clearances.
**A vent must not terminate directly above a sidewalk or paved driveway, which is located between two
WARNING
Always maintain minimum clearances around vent systems. The minimum clearances to combustibles for horizontal vent pipe are 3" at the top and 1" at the sides and bottom of the vent system until the pipe penetrates the nearest vertical wall (1" required). A 1" minimum clearance all around the pipe must be maintained at outside wall and on vertical runs. Do not pack the open air spaces with insulation or other materials. This could cause high temperatures and may present a fire hazard.
16 | 54D5031 |
