Lochinvar Shield SNA285-125 - Manual (Page 29)

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The Shield water heater may be installed with a single pipe carrying the flue products to the outside while using combustion air
from the equipment room. The vent pipe may terminate either vertically (FIG. 5-1) above the roof line in a conventional vent
manner or on a sidewall (FIG. 5-2).
Follow the requirements in the General Venting, Sidewall Direct Venting, and Vertical Direct Venting sections for vent material
specifications, vent length requirements, and vent termination requirements.
Combustion and ventilation air must be supplied to the equipment room per the requirements on page 15 of this manual for
proper operation of the Shield water heater when utilizing the single pipe method.
Figure 5-1 Vertical Direct Venting w/Room Air Figure 5-2 Sidewall Direct Venting w/Room Air
5
Conventional and sidewall venting
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