Does the size of AC unit effect performance? Yes! Often, homeowners who buy based on the biggest cooling capacity are disappointed in the final performance of their system.
If the unit is too large, the space gets too cool and humidity is not removed. You’ll feel cold and clammy. Plus the frequent cycling can wear out your AC Unit faster since the hardest load on your AC is when you start it up. You can also freeze up the AC unit if the air flow is too low and the unit can not be kept from freezing up. Freezing up of a central AC system is a recipe for disaster on the HVAC equipment.