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Ti Series
4.0 VENT/AIR-INTAKE TERMINATION CLEARANCES
The quick reference table below is to be read in conjunction with the numbered notes as indicated,
Figures 4-1 through 4-6, and the Venting Rules and Guidelines in Section 3.0. The instructions detailed
in this section are a combination of Trinity Ti specific and National Gas Code restrictions. Compliance alone doesn't insure a
satisfactory installation as good common sense must also be applied. Failure to follow these instructions may result in fire,
property damage, serious injury or death.
Table 4-1 Termination Clearances Quick Reference Table
Clearances to Air-Inlet Termination
A Above grade/roofline and snow level
B Above roof line - Concentric Vent
C To exhaust vent from any other boiler
Clearances to Exhaust Vent Termination
D Minimum vertical separation above air inlet
E Minimum horizontal separation from air inlet
F Window, door or building opening
G To combustion air inlet from any other boiler
H Non-mechanical air supply inlet to building
I Mechanical air supply inlet to building
J Soffit, overhang, eave or parapet
K Soffit vent or vent opening in an overhang, eave or parapet
10
L Outside corner
M Inside corner of an L-shaped structure (including walls and fences)
N Electric meters, gas meters, regulators and relief equipment
P Each side of center line above or below meters, regulators and relief devices
Q Above a paved sidewalk, driveway, or parking lot on public property if adjacent
R Above a sidewalk, driveway, or parking lot on public property
S Above a sidewalk, driveway on private property between / serving both dwellings
T Under a concrete veranda, porch, deck, or balcony
U Above, under or near exterior stairs
V Into a canopy or carport
Notes:
1 - Canadian installations must comply with the current CSA B149.1 Natural Gas and Propane Installation Code and local
building codes.
2 - US installations must comply with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code and local building codes.
3 - Horizontal separation center-to-center (c.c.) 4"-12" (102-305 mm). Refer to "Venting Rules and Guidelines" for
horizontal separation > 12" c.c. as it may impact vertical separation clearances.
4 - For US installations, an exhaust vent may be 3 ft above a mechanical air supply inlet if within 10 ft. [3 m] horizontally.
5 - Horizontal clearance must be observed up to a height of 15 ft. [4.6 m] above/below the meter, regulator, or relief devices
6 - Concentric Vent must protrude from the roof precisely 24" [610 mm] measuring from the terminal end-cap vanes.
7 - Permitted if veranda, porch, deck, or balcony is made of concrete and a minimum of two sides are fully open beneath.
8 - 24" is the recommended snow level allowance above grade/roofline or any surface that will support snow, debris, or ice
(i.e. for roof venting clearances - roofline and snow level). If living in a snowfall region, consult your local weather
office for the maximum typical snowfall for your area.
9 - Note that the vent must maintain a minimum vertical distance above the air inlet. Example: Vent height = 18" (457
mm) above air inlet + 12" (305 mm) for air inlet above grade/roof line and snow level = 30" (762 mm) above grade and
snow level.
10 - Clearances to an outside corner to be in accordance with local installation codes.
11 - In Canada, concentric vent materials are subject to approval by local inspectors. See Termination Kits in Section 3.0.
12 - Above public walkways, driveways or parking lots if adjacent to it and condensate cannot drip, freeze, or create a hazard.
13 - Contact the manufacturer for special exemptions relating to multiple boiler installations using concentric vents.
X
- Not permitted by National gas code(s) and/or recommended by boiler manufacturer.
_
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6, 11, 13
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3
4
7
Installation and Operation Instructions │Trinity
1
Canada
Min. Distance
12 in.
305 mm 12 in.
24 in.
610 mm 24 in.
36 in.
915 mm 12 in.
Min. Distance
18 in.
457 mm 18 in.
4 in.
102 mm
36 in.
915 mm 12 in.
36 in.
915 mm 12 in.
36 in.
915 mm 12 in.
6 ft.
1.83 m
24 in.
610 mm 24 in.
6 ft.
1.83 m
-
-
36 in.
915 mm 36 in.
6 ft.
1.83 m
5
36 in.
915 mm 36 in.
12
7 ft.
2.13 m
X
X
X
X
24 in.
610 mm 24 in.
X
X
X
X
2
USA
Min. Distance
305 mm
610 mm
305 mm
Min. Distance
457 mm
4 in.
102 mm
305 mm
305 mm
305 mm
3 ft.
915 mm
610 mm
6 ft. 1.83 m
-
-
915 mm
4 ft. 1.22 m
915 mm
7 ft. 2.13 m
X
X
X
X
610 mm
X
X
X
X
.
15
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