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Finned copper tube gas boilers & water heaters – Boiler Manual
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Figure 1
VENT OPTION 1: DIRECT VENT — Horizontal air intake and venting for a single direct vent system
Vent pipe and air pipe equivalent lengths must not exceed 100 feet each. See Table 3 or 4 for min. pipe diameters.
W hen running horizontal combustion
air and venting for single or multiple units,
exhaust and combustion air terminals must
be installed on the same plane (outside wall)
in order to prevent pressure differences due
to prevailing winds. In cold climates, double-
wall or insulated inlet pipe is recommended to
prevent condensation.
Figure 2
VENT OPTION 1: DIRECT VENT — Horizontal air intake and venting for multiple direct vent systems
Vent pipe and air pipe equivalent lengths must not exceed 100 feet each. See Table 3 or 4 for min. pipe diameters.
