Mastic Spark Modern Fires 91P - Manual (Page 15)

14 L100001 15
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VENT INSTALLATION
Figure 8 - Horizontal Vent Termination Location
Vent Terminal Air Supply Inlet Area Where Terminals Not Permitted
Inside Corner Detail
FOR HORIZONTAL TERMINATION
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. [*12" (305mm) minimum].
G = Clearance to an inside corner. [*12" (305mm) minimum]
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 non-mechanical air supply inlet to building or the combustion air inlet to any other appliance [*12"
(305mm) minimum].
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 [*12" (305mm) minimum *** ].
N = Clearance above a roof shall extend a minimum of 24" (610mm) above the highest point when it passes through the roof
surface and any other obstruction within a horizontal distance of 18" (457mm).
* 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 single-family dwellings
and serves both dwellings.
*** Only permitted if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
Always maintain minimum clearances around vent systems. The minimum clearances to
combustibles for horizontal vent pipe are
4" at the top and 1" at the sides and bottom of
the vent system until the pipe penetrates the nearest vertical wall. A 1" minimum clearance
all around the pipe must be maintained. Do not pack the open air spaces with insulation
or other materials. This could cause high temperatures and may present a fire hazard.
WARNING