Central ac or wall units

[RJ Dixon]

Hello BP

I am currently in the process of buying a triplex. My question is about the AC. All 3 units have window units. They all also have central AC units hooked up but not being used not sure if they work or not. Should I keep the wall units or run central AC ? I know the cost is lopsided. The units at 450,850,1400 square feet. Thanks for your input.

Cheers