Vent Clearances - Empire Comfort Systems BF28(B,C,G)M(N,P)-5 Installation Instructions Manual

US Installation 1
Clearance above any grade,
A =
veranda, porch or balcony
Clearance to window or door
B =
that may be opened
Clearance to permanently
C =
closed windows
Vertical clearance to venti-
lated soffit located above the
D = terminal within a horizontal
distance of 2 ft (61 mm) from
the center line of the terminal
Clearance to unventilated
E =
soffit
F = Clearance of outside corner
G = Clearance of inside corner
Clearance to each side of
H = center line extended above
meter/regulator assembly
Clearance to service regulator
I =
vent outlet
Page 10

VENT CLEARANCES

Figure 1
12 in (30 cm)
6 in (15 cm) for appliances ≤
10,000 Btu/h (3 kW), 9 in (23
cm) for appliances > 10,000
Btu/h (3 kW) and ≤ 50,000
Btu/h (15 kW), 12 in (30 cm)
for appliances > 50,000 Btu/h
(15 kW)
*
*
*
*
*
*
*
Clearance to non-mechanical
air supply inlet to building or
J =
the combustion air inlet to any
other appliance
Clearance to a mechanical air
K =
supply inlet
Clearance above paved
L = sidewalk or paved driveway
located on public property †
Clearance under veranda,
M =
porch deck, or balcony ¥
In accordance with the current ANSI Z223.1/NFPA 54, National
1
Fuel Gas Code
A vent shall not terminate directly above a sidewalk or paved
† driveway that is located between two single family dwellings
and serves both dwellings.
Permitted only if veranda, porch, deck or balcony is fully open
¥
on a minimum of two sides beneath the floor.
For clearances not specified in ANSI Z223.1/NFPA 54 or CSA
*
B149.1, refer to local codes.
6 in (15 cm) for appliances ≤
10,000 Btu/h (3 kW), 9 in (23
cm) for appliances > 10,000
Btu/h (3 kW) and ≤ 50,000
Btu/h (15 kW), 12 in (30 cm)
for appliances > 50,000 Btu/h
(15 kW)
3 ft (91 cm) above if within 10
ft (3 m) horizontally
*
*
30259-6-0314