Proportioned AC

Using the properly sized room air conditioner is important for comfort and efficiency. Buying too large a unit will chill the air without removing humidity, leaving you feeling cold and clammy. Talk to your dealer to determine the right size for your needs.
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AC Fan

Set the fan on your central air conditioner to "on" rather than "auto." This will circulate air continuously, keeping the temperature more even throughout the house and aiding in dehumidification.
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Beat The Heat

Install window air conditioners snugly. Insulate spaces around air conditioners for a tighter fit. An air conditioner with a tight fit around the windows or wall openings will make less noise and allow less hot air in from the outside. Check air-conditioning ducts for proper insulation. Insulation around ducts prevents cool air from leaking and keeps it directed through the vents.

Make sure your home is properly insulated. This will help you to conserve electricity and reduce your home's power demands for air conditioning. Weather-strip doors and windowsills to keep cool air inside, allowing the inside temperature to stay cooler longer.

During a drought, conserve water by placing a brick, or another large solid object, in your toilet tank to reduce the amount of water used in flushing.

Consider keeping storm windows installed throughout the year. Storm windows can keep the heat out of a house in the summer the same way they keep the cold out in the winter Protect windows. Hang shades, draperies, awnings, or louvers on windows that receive morning or afternoon sun. Outdoor awnings or louvers can reduce the heat entering the house by as much as 80 percent.

If you have a fan installed to vent warm air out of your attic, use the fan to help keep your home cool.
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Duct Leaks

Check your ducts for air leaks. First look for sections that should be joined but have separated and then look for obvious holes. Consult with a professional about repairing duct leaks. Safe duct repairs require a licensed heating, ventilating, and air-conditioning contractor.
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Air Conditioner Size

Two major decisions should guide your purchase of a room air conditioner. Buy a correctly sized unit. Buy an energy-efficient unit. If the room is very sunny, increase capacity by 10%. If the unit is for a kitchen, increase the capacity by 4,000 Btu per hour.
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Room to Breathe

Air conditioners need room to take in and exhaust air and should have at least 18 inches of clearance from furniture, plants, and drapes. If the air cannot circulate around the unit, heat may build up and cause damage to the coils.
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AC Insulation

If you have a room air conditioner, remove it for the winter or seal it up and insulate it. Water heater insulation jackets can work well for covering and insulating the air conditioner.
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