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is appliance is a gas-red direct vent hot water boiler with
cast aluminum boiler sections. A revolutionary cast aluminum
heat exchanger means better heat transfer and thermal storage
than similarly sized cast iron boilers, which results in higher
eciency. e heating system water absorbs large amounts of
heat from the cast aluminum heat exchanger, cooling the ue
gases and causing condensation. Sealed combustion, premix
gas burner, and low ame temperature means drastically
reduced CO and NOx emissions, which contribute to a cleaner
and healthier environment.
is appliance, unlike normal residential atmospheric and
induced dra units, takes its combustion air directly from
the outdoors (sealed combustion) and does not compete with
building occupants for fresh air. Sealed combustion (also
known as “direct vent”) is the safest and best way to obtain
plenty of clean combustion air. e induced dra fan draws
in the outside combustion air, then takes the cooler ue gases
from the boiler unit and provides a positive removal of the ue
gases from the building through inexpensive and readily avail-
able PVC and CPVC pipes.
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