22
LDAP-IOM (01-22) 207733-A
Double-wall or Category III vent pipe
Reznor (option CC1)
vent cap (Note positions
(shaded areas) of vent
cap openings.)
Figure 11. Horizontal Vent Terminal
INSTALLATION—CONTINUED
Venting Connections—Continued
Vent Terminal (Type of Pipe and Vent Cap) Requirements—Continued
Table 11. Minimum Clearance Requirements for Horizontal Vent Terminal
Component/Structure
Minimum Clearance, All Directions Unless Specified (Feet (Meters))
Forced air inlet within 10 feet (3 .1 meters)
*
3 (0 .9) above
Combustion air inlet of another appliance
6 (1 .8)
Mechanical air supply inlet to any building
Canada: 6 (1 .8)
Any building opening (door, window, or gravity air inlet)
4 (1 .2) horizontal and below
1 (0 .3) above
Gas meter,
**
electric meter, and relief equipment
US: 4 (1 .2) horizontal
Canada: 6 (1 .8) horizontal
Gas regulator
**
US: 3 (0 .9) horizontal
Canada: 6 (1 .8) horizontal
Adjoining building or parapet
6 (1 .8)
Adjacent public walkway
7 (2 .1) above
Grade (ground level)
3 (0 .9) above
*
Does not apply to the inlet of a direct vent appliance .
**
Do not terminate the vent directly above a gas meter or service regulator .
