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The dehumidifier is supplied with two 8” round collars. An integral backflow damper is installed in the outlet collar. In a ducted installation, the
dehumidifier pulls air from the living space or HVAC return duct and supplies the dehumidified air to the HVAC supply duct (See Figures 5, 6 & 7).
DUCTED INSTALLATION
• Move supply collar to the desired location, if necessary. (See Supply Collar in SET-UP Section)
• The unit can be ducted to the supply or both the return and supply. The dehumidifier inlet ducting must be a minimum of 6” upstream of the
HVAC system air cleaner and the outlet must be ducted a minimum of 6” downstream of the cooling coil.
• Use the least amount of ductwork possible. To ensure best performance, do not exceed a total of 50 feet of duct installed in accordance with
SMACNA Standards. UL approved, 8” diameter, insulated duct is recommended for all connections.
• All joints and seams must be sealed.
DUCTING
HVAC / FURNACE
115 VAC
DEDICATED
CIRCUIT
DEHUMIDIFIER
SUPPLY DUCT
RETURN
DUCT
A-COIL
DEHUMIDIFIED AIR IS SUPPLIED
DOWNSTREAM FROM A-COIL TO
MINIMIZE EVAPORATION OFF A-COIL
AIR IS PULLED
FROM MAIN
RETURN DUCT
DEHUMIDISTAT WITH
SET POINT KNOB
CONDENSATE HOSE
(TO COMMON DRAIN OR OUTSIDE)
FIGURE 5 – Basement Installation
90-1423
MAIN RETURN
DUCT
DEHUMIDIFIER
MAIN SUPPLY DUCT
CONDENSATE
HOSE
(TO COMMON
DRAIN OR
OUTSIDE)
PRINCIPAL
LIVING SPACE
115 VAC
DEDICATED
CIRCUIT
AIR FILTER
ACCESS
DOOR
HVAC/FURNACE SYSTEM
SHOWN IN HORIZONTAL
ORIENTATION
DEHUMIDIFIED AIR IS SUPPLIED
DOWNSTREAM FROM EVAPORATOR COIL
TO MINIMIZE EVAPORATION OFF COIL
HVAC EVAPORATOR COIL
RELOCATE DEHUMIDISTAT
TO LIVING SPACE
FIGURE 7 – Attic Installation
90-1423
DEHUMIDIFIED AIR IS SUPPLIED
DOWNSTREAM FROM A-COIL TO
MINIMIZE EVAPORATION OFF A-COIL
115 VAC
DEDICATED
CIRCUIT
A-COIL
SUPPLY DUCT
HVAC / FURNACE
CONDENSATE HOSE
ON DEHUMIDIFIER
(TO COMMON DRAIN
OR OUTSIDE)
DEHUMIDIFIER
FIGURE 6 – Equipment Room/Closet Installation
90-1423
Note 1: Attic installations require the following.
1. The dehumidistat must be removed from the
unit and relocated in the living space. An
insulated cover plate is provided to cover the
dehumidistat opening.
2. The dehumidifier must be installed in a
secondary drain pan with a float switch.
Note 2: Vibration isolators placed under the
dehumidifier feet are recommended when the
dehumidifier is installed on ceiling joists.
3