How to Pick a Central Air Conditioner
A central air conditioner is the main operating component in a central cooling system. Because these units represent a fairly substantial investment for most buyers, it is important to select the best air conditioner for your home. If you pick a unit that's too small, it may not keep your home cool. A unit that's too large will waste money and energy each month. To pick a central air conditioner, consider factors such as size, efficiency rating, appearance and installation requirements. Does this Spark an idea?
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Instructions
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Size your air conditioner correctly for your home. According to the Salt River Power Company, buyers should look for one ton (12,000 BTU's) of cooling capacity for every 500 square feet of living space. This is a general rule; however, so also consider factors such as insulation, climate and sun exposure. Consult the Energy Star Air Conditioning Sizing Tutorial in the Resources section of this article for more information on proper sizing.
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Compare energy efficiency ratings. The seasonal energy efficiency rating (SEER) of an air conditioner tells buyers how much cool air is created per unit of energy consumed. The American Council for an Energy Efficient Economy (ACEEE) recommends buyers choose a unit for a SEER rating of 14.5 or higher. If you live in a very hot climate, choose a higher SEER rating to save even more on your monthly energy bills.
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Check to see what type of refrigerant each unit uses. According to ACEEE, freon (R-22) is the most widely used type of refrigerant used in air conditioning. As of 2010, this refrigerant can no longer be produced due to global warming and environmental concerns. ACEEE recommends looking for units that use R-410a instead of freon. These units are more expensive upfront but will likely be much cheaper to maintain and refill as time passes.
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Review installation options. Some central air conditioning units are designed for rooftop installation while others are installed at ground level. According to the Western Area Power Association, rooftop units are the least expensive, both in terms of upfront costs and operating expenses. Ground units are more expensive but are easier to install and maintain. Keep in mind that your existing roof may require additional supports before you can safely install a rooftop unit.
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Evaluate maintenance for each unit. Check to see that the filter and any gauges on each unit are accessible and easy to operate/maintain. Look for air conditioners made from quality materials like stainless or galvanized steel to minimize rust and extend the life of your equipment.
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Examine the appearance of your air conditioner. Whether your unit is mounted on the ground or the rooftop, it can have a significant impact on the appearance of your home or property. Find a unit that is compact enough not to stand out or that is designed to blend in or complement your existing home decor.
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