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Installation & Operation Manual
12" MIN. BETWEEN EDGE OF AIR
INLET AND ADJACENT VENT OUTLET
VENT / AIR
TERMINATION
VENT
AIR
Figure 4-5A Multiple Vent Terminations (must also
comply with Figure 4-1A)
All vent pipes and air inlets must
terminate at the same height to avoid
possibility of severe personal injury,
death, or substantial property damage.
Multiple vent/air terminations
1. When terminating multiple Knight boilers terminate
each vent/air connection as described in this manual
(FIG. 4-5A).
2. Place wall penetrations to obtain minimum clearance
of 12 inches between edge of air inlet and adjacent vent
outlet, as shown in FIG. 4-5A for U.S. installations. For
Canadian installations, provide clearances required by
CSA B149.1 Installation Code.
3. The air inlet of a Knight boiler is part of a direct vent
connection. It is not classified as a forced air intake with
regard to spacing from adjacent boiler vents.
ƽ WARNING
Figure 4-5B Alternate Multiple Vent Terminations w/Field
Supplied Fittings (must also comply with Figure 4-1B)
4 Sidewall direct venting
Termination and fittings
1. The air termination coupling must be oriented at least
12 inches above grade or snow line as shown in FIG. 4-1A,
page 21.
2. Maintain the required dimensions of the finished
termination piping as shown in FIG. 4-1A, page 21.
3. If using the alternate sidewall termination do not extend
exposed vent pipe outside of the building more than what
is shown in this document. Condensate could freeze and
block vent pipe.
4. PVC/CPVC terminations are designed to accommodate
any wall thickness of standard constructions per the
directions found in this manual.
5. Stainless steel terminations are designed to penetrate
walls with a thickness up to 9.25 inches of standard
construction.