Window unit
Better in what way? A window unit cools better but can ruin your wall. I should say ultimately will ruin your exterior wall. A portable unit is not as efficient but is usually quieter and can be moved around the house.
A window unit.
My opinion window unit. Now it has it's negative sides too. It needs to be properly installed cause it's very common to have the condensation from the unit leak and cause damage to your window frames and wall around it which can become costly
WINDOW
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