We owned designer Gardenia approx. 2000 sq. ft. We extended and enclosed the lanai (420 sq. ft.). Tossed around mini-split on lanai, but we decided we wanted to have A/C ducts and return in lanai. If you have a larger home you may want to consider what we did when we upgraded/replaced our A/C. We had Munn's installed a "zoned" A/C system with 4 zones. Each zone has its own thermostat to control temperature in that zone. We actually moved the original whole-house thermostat that was located in hallway to master bedroom, just opposite the kitchen, to the hallway next to living room. This made more sense to us to control living/dining/kitchen area of the house. Our four zones - main living area, master bedroom, guest bedrooms and bath, and lanai. We did not need to cool whole house at night just to have master bedroom colder. Or we could cool lanai only when we were using it. More efficient and more control over each zone.
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