When buying a window air conditioning unit, more is not necessarily better. Base the size of the air conditioning unit on the size of the room. An air conditioning unit that is too big for the room will work harder and most likely cost you more. Perform regular maintenance on your air conditioning unit. Replace the filter monthly during the cooling season and have a professional service your system at the beginning of each cooling season. Don’t buy the cheapest ones, but also don’t buy the most expensive unless someone in the family suffers from air-borne allergy problems.
Remember, the cooling system is one of the biggest energy guzzlers in your home. Make sure your air conditioning condenser is located in a shady spot if possible. Plant trees and shrubs around your house to help reduce the heat of the sun, especially on the west and south side of the house.
Sealing up air leaks in your house will reduce your air conditioning costs.
Caulk or seal places where utilities come into your home (plumbing, electricity, dryer vents, etc.). Weather strip around drafty windows and doors to hold a seal.
When possible, install energy efficient ceiling fans and run them on hot days. If it’s just a little too warm for comfort, use the ceiling fan without air conditioning. This of course will depend on where you live. Use the ceiling fan only when you’re in the room, because running the fan doesn’t actually lower the temperature of the room.
Another money saver to consider is painting your house a lighter color. The darker the color of your house, the more heat it will absorb, so choose lighter colors for the exterior.
Any heat that’s generated inside your home has to be removed by your cooling system, so avoid generating heat inside your home whenever possible. Cooking on your outdoor grill as often as possible is a great way to remove heat. Other ways to help reduce the heat is by using a microwave, crock pot or Dutch oven.