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Phantom Series
1. Locate the desired installation location.
2. Use a stud finder to locate the ceiling joists.
3. Place a piece of plywood atop the ceiling joists to support the unit's weight. Place the Ultimate Plus unit on top of the plywood
and make sure it rests securely.
4. Secure the unit to the ceiling joists according to state and local ordinances.
NOTE:
WhisperKOOL strongly recommends the use of a secondary drain pan with the unit. Install the drain line according to the
diagram on page 23.
INSTALLING THE UNIT IN AN ATTIC
Plenum
Ceiling joist
Plywood