To straighten them, use the edge of a plastic putty knife or credit card. It’s not uncommon for a couple of fins on the air conditioner’s back to get mashed or bent as you’re handling the appliance. Always let the filter dry before reinstalling it. If it’s really grubby, give it a light scrubbing with water and dish detergent, and rinse it clean.
To maintain your AC, the best thing you can do is regularly vacuum the air filter. Shop More Window Air Conditioners on Sale at Amazon Scroll down to the bottom for some maintenance tips to help you keep your appliance running for as long as possible. We also look for high CEER ratings and consulted guides from Wirecutter, the Spruce, and HGTV. Most models we recommend throw cool air six to eight feet.įor the appliances we haven’t tested, we consulted engineers at the manufacturers, scoured the specs, noted features, and considered user reviews. Next, we measured how far away the cooling breeze could be felt, known as throw. We ran each appliance at various settings and used an infrared thermometer to measure the AC’s effect on its surroundings, such as walls and nearby objects. We tested several of the window air conditioners we recommend by installing them in a 1,200-cubic-foot space with a high ceiling. We surveyed the market for units with great construction quality, energy efficiency, noise reduction, simplicity of use, convenience, ease of maintenance, and versatility. Others have smartphone features that allow you to control your unit from afar and geofencing that automatically turns the unit on when your phone comes within a radius of your home. Some smarter appliances can even ramp back up, cooling your room again toward dawn. Some are equipped with a dehumidification setting for dealing with extra moist air, a heater, a fan to use without cooling, and timers that allow you to slowly back off the cooling output at night as you fall asleep. More expensive window air conditioners are typically more fully featured. Some window air conditioners have handheld remotes or employ smartphone apps for controls. Controls range from simple knobs to buttons to touch-activated electronic panels similar to microwaves or washing machines. Window air conditioners are no different from other appliances regarding programming and controls. For example, a 20-by-15-foot room would require a small, 6,000-BTU air conditioner. Measure the square feet of the room’s floor and multiply that by 20.
The AC unit you choose must have roughly 20 BTUs of cooling per square foot of room space. It includes the appliance’s efficiency when the compressor is energized and running and when it’s not running, in standby mode.
The CEER number expresses the ratio of cooling capacity, measured in British Thermal Units, relative to how much electricity the appliance uses to cool the space. CEER is the efficiency rating that applies to window air conditioners. Look for an AC unit with the highest Combined Energy-Efficiency Ratio possible. However, the appliance’s cooling capacity, features, and controls differ. The cooling process is identical among various window air conditioners. Alternatively, the fan on the back picks it up and throws it against the hot coil, where it’s converted back to moisture vapor and discharged outside with the hot air. This water drips down to the back of the appliance and runs out through a drain. The moisture vapor in the indoor air condenses on the coil’s cold surface. In the summer, there’s a lot of moisture vapor suspended in the air, and in order for you to feel more comfortable, the air conditioner has to remove it. In exchange, you get cool and dry air pumped inside.Įqually important in the cooling process is dehumidification. Another motor-driven fan blows outdoor air over this hot, liquid-filled coil and discharges the heat to the outdoors. The appliance’s compressor draws the heated gas to a coil on the back of the appliance, converting the gas into a liquid. The heat energy in the room passes through the metal coil into the cold refrigerant inside. Window air conditioners use motor-driven fans to pull hot, moist indoor air over a metal tube coil with cold refrigerant gas inside.
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