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Finned copper tube gas boilers & water heaters – Boiler manual
FTXLF-IOM-HN-1-110308 Copyright 2008 Mestek, Inc.
VENT OPTION 3: SIDE WALL VENT — Side wall venting
Figure 7
Vent pipe and air pipe equivalent lengths must not exceed 100 feet each.
option 3: siDe WALL VentinG
positiVe pressUre —cAteGory iV
FiGUre 7
(VENT/AIR PIPE EquIVALENT LENGTHS uP TO100 FEET MAxIMuM)
In this configuration the boiler/water heater blower is used
to push the flue products horizontally to the outdoors, see
Figure 7. The air for combustion is taken from the space
in which the unit is installed. The applicable instructions under the
“Combustion Air & Ventilation” section must be followed! The vent
guidelines under the Horizontal Direct Vent Systems section must
also be followed.
To ensure proper boiler operation, boilers that use
room air must not be fired at less than 33 % input.
