The United States is a very big country, and there are many climates throughout the land and territories. The south tends to be warmer than the north. The southwestern portion of the country can be very hot and dry in the summer, yet cool in the winter. Sometimes throughout the same state you can have different subclimates. So this makes cooling and heating system needs vary a lot, even within the same state. For instance, it can be much cooler at night if you live in the mountains. And, the temperature can also be a little cooler by the sea as well. Even in the summer, if you live in the mountains, you may not need air conditioning that much. Now, if you live in the southwestern part of the U.S., or mid to south portion of the east coast, you will find a good air conditioning system to be necessary to feeling cool and comfortable. In areas that aren’t as warm, you may get by with a few window air conditioning units. So, if you live in the area where the climate is hot and humid even at night, you will find that a central heating and air conditioning unit is your best choice to be comfortable. A central air conditioning unit may cost more in the short term. But with payment plans and financing, central air conditioning systems can be a life saver. During those hot summer months, you will be glad to have a central air conditioning unit. If you live in a climate that is colder, a centralized heat and air conditioning system, can provide even cooling throughout your home.