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Ultra-Aire 70H Installation Instructions
Indoor Air
Return
Backdraft
Damper
Dry Air to
Basement
Manual
Damper
Motorized
Damper
Fresh Air Intake
(Optional)
Basement / Crawlspace Intall
Air Handler Supply
Ultra-Aire Supply
Recommended HVAC System Installations
DUCTING TO HVAC SYSTEMS
The recommended installation pulls 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 8" air return for the Ultra-Aire 70H from a central area of the structure.
• Duct the supply of the Ultra-Aire 70H 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 70H, it
is possible to select one to disconnect from the existing HVAC system and use it for the dedicated
Ultra-Aire 70H return. Always 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.
Ultra-Aire
Supply
Air Handler
HVAC Supply
Dedicated Ultra-Aire 70 Return to A/C Supply
HVAC Return
Indoor Air
Return
Fresh Air Intake (Optional)
Motorized Damper
Backdraft
Damper
Attic Installation -
Dedicated Ultra-Aire Return to HVAC Supply
Duct the supply of the Ultra-Aire 70H
to a 8” x 8” x 8” tee damper
that is 20 percent open to the
basement/crawlspace.
Basement/Crawlspace Installation -
Dedicated Ultra-Aire Return to HVAC Supply
Summary of Contents for 70H
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