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Mascot ST Tankless Water Heater
4.6.2 Non-Direct Venting (Single Pipe) Clearances
A
Clearance above grade, veranda, porch, deck, or balcony
B
Clearance to window or door that may be opening
C
Clearance to permanently closed window
Vertical clearance to ventilated soffit located above the terminal
D
within a horizontal distance of 2 feet from the center line of the
terminal
E
Clearance to unventilated soffit
F
Clearance to outside corner
G
Clearance to inside corner
Clearance to each side of center line extended above
H
meter / regulator assembly
I
Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to building or the
J
combustion air inlet to any other appliance
K
Clearance to a mechanical air supply inlet
Clearance above paved sidewalk or paved driveway located on
L
public property
M
Clearance under veranda, porch, deck, or balcony
Table 5.
Non-Direct Vent Clearances
Description
US Non-Direct
Canadian Non-Direct
12 in (30 cm)
12 in (30 cm)
48 in (120 cm) below
or to side of opening;
36 in (91 cm)
12 in (30 cm) above
opening
*
*
*
*
*
*
*
*
*
*
36 in (91 cm) within a
height 15 ft (4.57 m)
*
above the meter/ regu-
lator assembly
*
36 in (91 cm)
48 in (120 cm) below
or to side of opening;
36 in (91 cm)
12 in (30 cm) above
opening
36 in (91 cm) above
if within 10 ft (3 m)
6 ft (1.83 m)
horizontally
*
7 ft (2.13 m)
*
12 in (30 cm)
Page 17
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