Fresh Air Ventilation - Ultra-Aire SD12 Installation Instructions Manual

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Installer's & owner's manual (24 pages)

Quick start manual (2 pages)

Table Of Contents

Table of Contents

Fresh air ventilation is optional.

Fresh air may be brought into the structure by connecting an insulated duct from outside the structure to

the 6" inlet of the Ultra-Aire SD12. A ventilation control is needed to program the time and frequency that

the unit introduces outside air. The time and frequency of ventilation should be based on the size and

occupancy of the residence.

• The fresh air ventilation duct should be connected to the 6" round collar on the front of the Ultra-Aire

SD12.

• An insulated 6" diameter duct provides up to 100-150 CFM of outside air.

• If a motorized damper is not being used, fresh air is controlled by the manual damper in the 6" collar

of the Ultra-Aire SD12. Performance of the Ultra-Aire SD12 can be impacted by inside and outside air

conditions.

• When a 6" motorized damper is used, a digital control is required.

• It may be necessary to use 8" duct work if additional fresh air is required.

• In cold climates or at times when the dew point is low, ventilation can be used to dehumidify the

structure, making the Ultra-Aire SD12 capable of year-round drying.

Fresh Air Ventilation With Dehumidifier Off and Fan Only Operation

Outside air mixes with the dehumidifier's return air before being supplied to the home. Outside

temperature, inside temperature and relative humidity will impact the combined outlet air conditions.

6" Fresh Air Inlet

(Optional)

10" Return Air Inlet

10" Supply Air Outlet

6" Fresh Air Inlet

(Optional)

10" Return Air Inlet

10" Supply Air Outlet

Note: Temperature and relative humidity may vary depending on duct distribution scheme.

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