Install Instructions

DUCTING TO HVAC SYSTEM – BASEMENT AND ATTIC INSTALLATIONS
The Preferred Installation is to duct the dehumidifier to pull air from and return dehumidified air to the HVAC return duct� This installation will ensure
warm, dehumidified air is thoroughly mixed with the HVAC system air before being discharged into the living space� Alternatively, the dehumidifier
can be ducted to discharge to the supply duct, but the external static pressure of the HVAC system must not exceed 0�6” w�c�
REQUIRED COMPONENT
10" Ductwork
DUCTING NOTES:
• Use insulated duct when the dehumidifier is located in an unconditioned space such as an attic or a garage�
• Use a minimum of 12” of flex duct at the dehumidifier inlet and outlet to prevent vibration noise transmission�
• When ducting return to return (preferred), the dehumidifier must be wired to turn on the HVAC fan when operating (see page 14)�
• When ducting return to supply, allow adequate space before the first branch duct to ensure the warm dehumidified air is thoroughly mixed with the
HVAC system air�
HVAC/FURNACE
AIR IS PULLED
FROM AND
SUPPLIED TO THE
RETURN DUCT
10" DUCT
DEHUMIDIFIER
6 ft
MIN
AIR IS
PULLED FROM
RETURN DUCT
HVAC/FURNACE
AIR IS DISCHARGED
TO SUPPLY DUCT
10" DUCT
0.6" w.c.
MAX
PLENUM BOX OR Y-FITTING
6 FT. MIN.
6" MIN.
AIR HANDLER
FILTER
10" DIA. INSULATED DUCT
BOTH SIDES
CONDENSATE PAN
PLENUM BOX
AIR HANDLER
PLENUM
0.6" w.c. MAX
24" MIN.
6" MIN. 6" MIN.
FILTER
CONDENSATE PAN
10" DIA. INSULATED DUCT
BOTH SIDES
90-2022 90-2023
90-2024 90-2025
FIGURE 11 – PREFERRED BASEMENT INSTALLATION FIGURE 12 – ALTERNATE BASEMENT INSTALLATION
FIGURE 13 – PREFERRED ATTIC INSTALLATION FIGURE 14 – ALTERNATE ATTIC INSTALLATION
10 English