Non-Energy Benefits of Efficient Central Air Conditioners
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Efficient central air conditioners may operate more quietly, be more visually appealing, have better temperature and/or moisture control, and be easier to maintain than minimum efficiency air conditioners.
Efficient entral air conditioners (CACs) may operate more quietly than standard (minimum efficiency) CACs. Most CACs that qualify for the ENERGY STAR label come with "sound blankets" on the compressor to make the outdoor condensing unit quieter.
Efficient ACs may be more visually attractive than minimum efficiency units. Manufacturers of high-efficiency CACs tend to put more effort into making the outdoor condensing unit look more attractive (e.g., better cabinet shape and better corner posts and grills).
Some efficient CACs may have better control systems that improve the humidity and/or temperature control.
Some efficient CACs are easier to maintain than minimum efficiency units. Some high-efficiency units have ports on the refrigerant tubing coming in and out of the compressor, which make it easier to check the refrigerant charge.
Make sure you buy a CAC that is properly sized for your home. Proper sizing helps to reduce humidity and therefore control mold and mildew, and also reduces energy consumption.