Selecting an Air Conditioner

Central Air Conditioners: Central air systems circulate cool air through a system of ducts. They are available in two different kinds of system: Split-system and packaged systems. Slit-system units are those central air systems in which an outdoor metal cabinet contains the condenser and compressor, while an indoor cabinet contains the evaporator. The indoor cabinet typically contains a furnace or the indoor part of a heat pump, so this system is the most economical to install in homes that already have furnaces but do not have air conditioners. In a packaged central air conditioner evaporator, condenser and compressor are located in one cabinet. Some include electric heating coils or natural gas furnaces which eliminate the need for separate furnaces.

Size Considerations

As you might suspect, larger air conditioners use more energy than smaller ones, so selecting a system that is sized appropriately for your home will keep your energy costs in check. Before deciding how large your air conditioner should be, assess the following considerations:

• How large a home do you have and how many windows does it have?
• Are your windows, walls and ceiling well insulated?
• How much shade cover your home?
• How much heat do your appliances generate?

Truly evaluating your energy needs will help you make an informed decision at purchase time.

Consider Air Conditioner Energy-Efficiency Ratings (EERs):

Each air conditioner has an EER, which, as you might have guessed, will give you some idea of how efficient your air conditioner is in comparison with similar systems. Choosing a system with a high EER rating, particularly one with an Energy Star label, will mean a lower energy bill down the line.

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