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Ultra-Aire.com | (800) 533-7533
Ultra Aire 98H / 120H Installation Instructions
Recommended HVAC System Installation
DUCTING TO HVAC SYSTEMS
The recommended installation draws air from a dedicated indoor air return and ducts the supply of the
dehumidifier to the air supply of the existing HVAC system. Utilize the optional fresh air ventilation duct to
provide outside air.
• Install a dedicated 10" air return for the Ultra Aire Dehumidifier from a central area of the structure.
• Install an insulated duct from outside to the 6" collar of the Ultra Aire Dehumidifier to provide fresh air
ventilation (optional).
• Duct the supply of the Ultra Aire Dehumidifier to the supply of the existing HVAC system with a backdraft
damper.
• If the existing system has multiple returns, instead of installing a dedicated return to the Ultra Aire
Dehumidifier, it is possible to select one to disconnect from the existing HVAC system and use it for the
dedicated Ultra Aire Dehumidifier return. Select a return from a central location in the house that is always
open to the rest of the structure. DO NOT use a return from a room where doors are kept closed.
• DO NOT locate return in a bathroom or kitchen.
• Control should be located remotely from the dehumidifier and placed in a central location.
Please visit our website at www.ultra-aire.com/install-options/ for more installation options.
Ultra Aire
Supply
Air Handler
HVAC Supply
Dedicated Ultra-Aire 90 Return to A/C Supp
HVAC Return
Fresh Air Intake
(Optional)
Motorized
Damper
Indoor
Air Return
Backdraft
Damper
Dedicated Ultra Aire Return to HVAC Supply
