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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
General Information
900301-00 08/2018
Innovative Hearth Products
BRT40ST See-Through B-Vent Gas Fireplaces
Figure 4
Figure 3
Vertical Vent Termination Clearances
VENT TERMINATION CLEARANCES
These instructions should be used as a
guideline and do not supersede local codes
in any way. Install venting according to local
codes, these instructions, the current National
Fuel Gas Code (ANSI-Z223.1) in the USA or
the current standards of CAN/CGA-B149.1
in Canada.
Vertical Vent Termination Clearances
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 which
extends at an angle greater than 45° upward
from the horizontal may terminate in accordance
with
Figure 4
, provided that in no case shall
any discharge opening on the cap be less than
2 ft. (.6 m) horizontally from the roof surface
(National Fuel Gas Code ANSI Z223.1 (NFPA
54) (CAN/CGA B149.1).
Multiple Terminations
These appliances may vent adjacent to and at
the same level with any other gas appliances
(including direct-vent appliances) provided that
there is at least 2 ft. (0.6m) between the proximal
edges of the vent caps. These appliances may
be vented adjacent to a chimney vent servicing
a solid fuel fireplace provided the B-vent cap
is at least 2 ft. (0.6m) away from the nearest
point of the chimney opening.
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
The vent / air intake termination clearances
above the high side of an angled roof is as
shown in the following chart:
Roof Pitch is X/12
12
X
Minimum Height from Roof
to Lowest Discharge Opening
Multiple Terminations
2 ft.
(0.6m)
Minimum
