Human: How do I know which type of ac system I need? Assistant: 
You can determine the type of air conditioning system you need by considering your climate, budget and energy efficiency. If you live in a hot and humid climate, an evaporative cooler may be a good option for cooling your home. If you have a larger budget to work with, a more efficient central air conditioner is likely the better choice. Finally, if you're looking for the most energy-efficient solution, a heat pump might be the best option.