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Ultra-Aire XT105H Installation Instructions
Air Handler
HVAC Supply
Dedicated Ultra-Aire 90 Return to A/C Supply
HVAC Return
Fresh Air Intake
(Optional)
Motorized
Damper
Indoor
Air Return
Ultra-Aire
Supply
Backdraft
Damper
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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 XT105H from a central area of the structure.
• Install an insulated duct from outside to the 6" collar of the Ultra-Aire XT105H to provide fresh air
ventilation (optional).
• Duct the supply of the Ultra-Aire XT105H 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 XT105H,
it is possible to select one to disconnect from the existing HVAC system and use it for the dedicated
Ultra-Aire XT105H 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.
Attic Installation -
Dedicated Ultra-Aire Return to HVAC Supply
Duct the supply of the Ultra-Aire XT105H
to a 10" x 10" x 10" tee damper
that is 20 percent open to the
basement/crawlspace.
Basement/Crawlspace Installation -
Dedicated Ultra-Aire Return to HVAC Supply
Basement / Crawlspace Intall
Air Handler Supply
Dry Air to
Basement
Backdraft
Damper
Manual
Damper
Ultra-Aire
Supply
Fresh Air
Intake
(Optional) Motorized
Damper
Indoor
Air Return
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