DUCT SIZING AND ROUTING
• Inlet and outlet collars fit 24" round duct.
• Unit performance decreases as airflow decreases, the shortest
possible duct lengths with minimal bends should be used.
• Do not exceed 1,000 feet of metal duct or 750 feet of flex duct.
EQUIVALENT LENGTH OF BENDS
45° bend 5 feet
90° bend 10 feet
180° bend 30 feet
• Max static pressure is 0.6" w.c.
• Install the dehumidifier in location where filter door, service access
panel, compressor side panel, and user interface are accessible, see
the Dehumidifier Installation and Operating Instructions for more
details.
• Do not install a bend in the ductwork within 2 feet of the
dehumidifier inlet or outlet.
• When selecting duct material, it is preferred to use metal ducting to
maintain airflow. If flex duct is to be used, ensure it is extended out
as much as possible to limit disruptions to the airflow. NOTE:Use
only insulated ducting when the inlet side of the duct work is
located outside of the conditioned space. In some instances when
the dehumidifier is placed outside of the conditioned space, the
cabinet of the dehumidifier may also need to be insulated to prevent
condensation formation on the exterior of the unit.
• Do not duct more than one dehumidifier together.
90-2579
• If using registers and diffusers, the total open area must be at least
453 in2, which is the equivalent area to a 24 inch round.
• When locating registers and diffusers be aware of the following;
– Relative to plants – do not directly vent onto plants.
– Relative to other dehumidifier inlets/outlets – must be a minimum
10 feet apart and do not direct toward one another.
– Relative to HVAC diffusers – ensure minimum 10 foot distance
from other HVAC diffusers.
• Ensure that the ductwork is supported within 2 feet of inlet and
outlet of the dehumidifier. Consult building codes and standards for
duct support requirements beyond 2 feet of the dehumidifier.
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