Mendota ML39 Assembly, Installation And Operating Instructions page 36

Exterior Vent Locations and Restrictions
Note: All measurements are to be taken from the center of the vent cap.
 -
Vent Terminal
A Clearance above grade, veranda, porch, deck, or
= balcony (*18 inches (45 cm) minimum)
B Clearance to window or door that may be opened
= (*18 inches (45 cm) minimum.
C *Clearance to permanently closed window
= (minimum 18 inches (45 cm) recommended to
prevent condensation on window)
D *Vertical clearance to ventilated soffit located
= above the terminal from the center-line of the
terminal 18" (45 cm) min. Minimum 24" (60 cm to
Vinyl Soffit)
E *Clearance to unventilated soffit 18" min (45 cm)
= min. Minimum 24" (60 cm to Vinyl Soffit)
F = Clearance to outside corner - 12 inches (30 cm).
G Clearance to inside corner - 12 inches (30 cm).
= Vinyl surfaces require 24" min (60 cm).
85-03-01136
X -
Air Supply Inlet
H
=
I =
J =
K
=
L
=
M
=
N=
ML39
 -
Area where terminal is not permitted
*Not to be installed above a meter/regulator assembly
within 3 feet (90 cm) horizontally from the center-line
of the regulator; within a height of 15 feet
*Clearance to service regulator vent outlet *3 feet (92
cm) minimum.
*Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance.
12 inches (30 cm) minimum.
*Clearance to a mechanical air supply inlet
In USA, 3 feet minimum above, if within 10 feet
horizontally. In Canada, 6 feet minimum
† Clearance above paved side-walk or a paved
driveway located on public property (*7 feet (2.1 m)
minimum)
Clearance under veranda, porch, deck, or balcony (*18
inches (45 cm) minimum ‡)
Minimum 24" horizontal clearance to any surface,
such as an exterior surface, for vertical terminations.
Page 36