A central air conditioner that’s too small isn’t going ... Higher SEER units also cost a lot more (though the cost is typically offset by the savings over time), so keep that in mind.

In general, the larger the AC unit, the larger (and more expensive) the evaporator coil cost. If you live in a large home with a powerful central AC system, you’ll spend more on an evaporator ...

A portable AC unit is cheaper to buy (typically ranging between $100-1000) and doesn't need installation. Central AC units ...