Why sizing matters more than brand
An oversized air conditioner cools the air quickly, satisfies the thermostat, and shuts off before it has removed much moisture. In a humid climate that produces a house that feels clammy at 72 degrees. It also short cycles, which is hard on the compressor.
A correctly sized system runs longer cycles at steadier load. It holds temperature more evenly, pulls more humidity out of the air, and lasts longer. Sizing comes from a load calculation that accounts for square footage, insulation, window area and orientation, ceiling height, and duct location.
