Description US Installations
1
1
,
2
2
Canadian Installations
2
,
3
3
A Clearance above grade,
veranda, porch, deck, or
balcony
12 in (30 cm) 12 in (30 cm)
B Clearance to window or
door that may be opened
6 in (15 cm) for appliances
≤ 10,000 Btuh (3 kW), 12 in
(30 cm) for appliances >
10,000 Btuh (3 kW) and ≤
100,000 Btuh (30 kW), 36
in (91 cm) for appliances
>100,000 Btuh (30 kW)
6 in (15 cm) for appliances
≤ 10,000 Btuh (3 kW), 9 in
(23 cm) for appliances >
10,000 Btuh (3 kW) and ≤
50,000 Btuh (15 kW), 12 in
(30 cm) for appliances >
50,000 Btuh (15 kW)
C Clearance to permanently
closed window
*
*
D Vertical clearance to
ventilated soffit located
above the terminal within a
horizontal distance of 2ft
(61 cm) from the center line
of the terminal
* *
E Clearance to unventilated
soffit
* *
F Clearance to outside
corner
* *
G Clearance to inside corner * *
H Clearance to each side of
center line extended above
meter/regulator assembly
3 ft (91 cm) within a height
15 ft above the meter/
regulator assembly
*
I Clearance to service
regulator vent outlet
Above a regulator within 3
ft (91 cm) horizontally of the
vertical center line of the
regulator vent outlet to a
maximum vertical distance
of 15 ft (4.5 m)
*
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