16
Ultra-Aire 98H Installation Instructions
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DUCTING TO HVAC SYSTEMS
Alternative Closet Installations
HVAC
Supply
Backdraft
Damper
Ultra-Aire
Supply
HVAC
Return
Fresh Air Intake
(Optional)
Ultra-Aire
Return
Central Return to HVAC Return
Duct the supply of the Ultra-Aire 98H
to the return side of the existing
HVAC system.
The HVAC fan must run when the
dehumidifier is running.
HVAC
Supply
Ultra-Aire
Supply
HVAC
Return
Fresh Air Intake
(Optional)
Ultra-Aire
Return
No Duct - Central Return to HVAC Return
Attach outlet duct with a vertical
flow through so air is not
discharged into wall or other
obstruction (see Page 7 for Vertical
Flow Through). The HVAC system
will naturally pull dehumidified
air from the closet and distribute
throughout the structure.
If the Recommended Closet Installation is not possible, there are several alternative installation options available.
• No inlet duct is required. Air is pulled through the passive vent or louver door from the living space.
• Install an insulated duct from outside to the 6" collar of the Ultra-Aire 98H to provide fresh air ventilation
(optional).
• Control should be located remotely from the dehumidifier and placed in a central location.
