GOLD
3f Venting — direct exhaust — installation
1.Do not mix types or manufacturers of vent materi- als.
2.Clean all joints before sealing. See vent manufac- turer’s instructions for cleaning and sealing joints.
Use their specified sealant. Do not use screws.
3.Install vent pipe with seams on top of vent horizon- tal runs. Follow requirements in Section 3e for vent termination.
4.Maintain minimum 2” clearance from combustible materials to vent pipe.
5.Vertical venting — See Figure 13. Follow vent manufacturer’s instructions for venting through roof.
•Vent pipe must extend through roof flashing, jacket or thimble.
•Vent may pass through floor, inside wall or concealed space when installed according to vent manufacturer’s instructions.
Sidewall venting — See Figures 14 and 15.
Vent must terminate at least one foot above anticipated snow line. Vent must be termi- nated only with:
•Tee or elbow with integral screen. (Tee may be mounted either vertically or horizontally.)
•Elbow and termination coupling with screen (not available for
6.Do not seal vent pipe (slip connector for
7.If passing through noncombustible wall, provide hole diameter large enough to insert the vent pipe
(slip connector for
8.Install horizontal drain tee as close as possible to boiler, in first horizontal run. See Figures 13 and 14.
9.Do not exceed the maximum vent system length given in Table 4, page 15.
Condensate drain line — use only silicone tubing rated for at least 400°F for the first 18” of condensate drain line, then other
On some installations, the condensate drain fitting may be omitted, provided:
•Vent manufacturer shows this option in their instruc- tions.
•Vent is sloped toward termination as shown in dotted lines in Figure 14.
•The vent is installed per
•Condensate drippage from such vents may accumu- late on the ground below. Consider traffic in the area to avoid hazard due to ice accumulation.
Figure 13 Direct exhaust vertical venting
Figure 14 Direct exhaust sidewall venting
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