The answer to 'best AC' is that the best air conditioner for your home depends on several factors, including the size of your home, your climate, energy efficiency needs, and budget. In general, a high-efficiency central air conditioner or a ductless mini-split system are great options for most homes.
Central air conditioners are a popular choice as they provide whole-home cooling and can be integrated with your existing ductwork. Look for units with a high SEER (Seasonal Energy Efficiency Ratio) rating, as these are more energy-efficient and can save you money on utility bills. Ductless mini-splits are also an excellent option, as they allow you to cool specific rooms or zones, are highly energy-efficient, and don't require extensive ductwork installation.