Answer:
A PTAC is a 42" wide ductless air conditioner that usually sits on the floor and is installed through a wall. One side of the unit faces the room, the other faces the outside. You've seen them in hotels and hospitals. PTAC stands for "packaged terminal air conditioner", which means it is a unitary (all in one) air conditioner.
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Replied By:
JEAN MURPHY
(March Air Reserve Base, PA)
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Replied Date:
12/19/2014