Filter
Top Products
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1
Roof Pitch * Feet * Meters
Flat to 6/12 1.0 0.3
6/12 to 7/12 1.25 0.38
7/12 to 8/12 1.5 0.46
8/12 to 9/12 2.0 0.61
9/12 to 10/12 2.5 0.76
10/12 to 11/12 3.25 0.99
11/12 to 12/12 4.0 1.22
12/12 to 14/12 5.0 1.52
14/12 to 16/12 6.0 1.83
16/12 to 18/12 7.0 2.13
18/12 to 20/12 7.5 2.29
20/12 to 21/12 8.0 2.44
VENT TERMINATION
CLEARANCES
Multiple Terminations
These appliances may vent adjacent to and at
the same level with any other gas appliances
(including direct vent appliances), provided
there is at least 2 ft (0.6 m) between the proxi-
mal edges of the vent caps. These appliances
may be vented adjacent to a chimney vent
servicing a solid fuel replace, provided the
B-vent cap is at least 2 ft (0.6 m) away from the
nearest point of the chimney opening.
Gas Vent Rule
Gas vent caps are not permitted within 8 ft (2.4
m) of a vertical wall or similar obstruction. Gas
vent caps that are located 8 ft or more from a
portion of a building that extends at an angle
greater than 45° upward from the horizontal
may terminate in accordance with Figure 4,
provided that any discharge opening on
the cap is NEVER LESS THAN 2 ft (0.6 m)
horizontally from the roof surface (National
Fuel Gas Code ANSI Z223.1 (NFPA 54) “Gas
Vent Termination” section) (CAN/CGA B149.1).
Figure 4
Roof Pitch is X/12
Minimum Height from Roof to
Lowest Discharge Opening
X
12
1" (25 mm)
Minimum
Gas Vent Rule
Table 5
SUPERIOR
®
B-VENT GAS FIREPLACES • MODELS SLBV-35, SLBV-40 • INSTALLATION INSTRUCTIONS
6
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.