7
Figure 1: Outside Clearances to the
Vent Cap per ANSI Z223.1-98
WARNING: The nearest point of the vent cap must be a minimum
horizontal distance of 6 FEET (1.83 m) from any gas pressure regulator or gas
meter (with the exception of the pressure regulator provided with this unit).
C
12 in. minimum
12 in. minimum
4 ft minimum
4 ft
minimum
12 in. minimum
3 ft minimum
Grade
Forced air
inlet
Mechanical draft
vent terminal
[see 7.8 (b)]
Mechanical draft
vent terminal
[see 7.8 (a)]
Less
than 10 ft
Direct vent terminal clearance
Minimum clearance, C
Input (Btu/hr) Clearance (in.)
10,000 or less 6
10,001 to 50,000 9
Over 50,000 12
[see 7.8 (c)]
For Sl units: 1 ft = 0.305 m; 1 in. = 25.4 mm;
1 Btu/hr= 0.293 W
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