Like shopping for tire chains during a blizzard, you dont want to find yourself desperately searching for air conditioning after the spring and summer heat have already hit. Start early and you will have time to fully research cooling options, review the needs of your home, and price shop both brands and local heating/cooling contractors. Choosing the right air conditioner or central air system for your home is not a decision you want to make when under the influence of a stifling heat wave.