![]() Some window AC units are built to meet strictĬriteria, such as, high efficiency compressors, high efficiency fan motors, cycling limiters, and timed on/off circuits. The higher the number, the less the unit will cost to operate.Īlso check out Energy Star ratings. These ratings are energy efficiency ratios. Just the same as a conventional air conditioning system, a window AC unit's Make sure, upon purchase, that the unit you select is easily serviceable. THIS IS VERY IMPORTANT! Clean or replace the filters often. 1,000 to 1,400 square feet = 24,000 BTUsĪdd 600 btu for each person regularly occupying the space, in excess of 2 occupants.Īdd 10% capacity if the space is heavily in the sun.Īdd 4,000 btu if the unit covers a kitchen.Īll air conditioners have a filtration system to keep the coils free from blockage. ![]() Square footage is width of the space X length of the space. To figure the size unit you need, find the square footage of the space you intend to cool. "Rule of Thumb" sizing for room air conditionersĬapacity is measured in BTUs, or British Thermal Units, per hour. Running a smaller properly sized unit for a longer period of time will use less energy to cool a room than running a larger unit for a shorter time. A larger unit will cost more to purchase, and will consume more energy to operate. The properly sized unit will effectively remove humidity as it cools the space. As a result, the room will feel damp and less comfortable. Therefore, a unit that is too large will cycle too rapidly to remove humidity properly. Humidity condenses from the air when it passes over the air conditioner's cooling coil. ![]() Bigger is not necessarily better.Īll air conditioners, except swamp coolers, work by removing both heat and humidity. Also, if you buy a unit that's too big for the space, it can actually be less effective than a unit sized properly for the space. A unit that is too small will simply run constantly and never reach the desired temperature. Just as we discussed earlier in our conventional AC pages, when choosing a window AC unit, size is just as important. Some room air conditioners can also be built into the wall, making it impractical to remove and store away. Some people prefer to remove and store the unit during the colder months. Read about Ductless Split Air Conditioners - click hereĪ window AC installation can be drafty. Spot cooling can be accomplished with portable air conditioners, window or portable swamp coolers, permanently mounted through-the-wall package AC units, and ductless split air conditioners, which we will discuss on a different page. Keep in mind that a freon-based window air conditioner is not the only room air conditioner option. If your intentions are to cool a small space in your home, one or two rooms, the window air conditioner would be a much more economical choice when compared to the cost of the installation of a conventional central air conditioner, but would also cost less to operate. This option could also be considered if installation of a conventional system is not practical due to the characteristics of the home. This type of window AC unit could be chosen for various reasons, such as economy, size of area needing to be air conditioned, intended use of the space, or perhaps an addition to a conventional system cooling the rest of the residence. The front of the unit is the air distribution component with the indoor evaporator coil, and the rear of the unit acts as the outdoor condensing unit of the conventional system. The window air conditioner operates under the same principals as a conventional air conditioner, except that all the components are located inside the cabinet of the window AC unit. The two are connected with copper lines, which transfer heat outside, via a freon, which circulates through the system. The air handler, or furnace, and AC coil are located indoors and the condensing unit is located outside. The typical conventional residential air conditioner is a split-system, which means that the 2 main components of the air conditioner are located in different locations. ![]() If you are familiar with our previous air conditioning pages, then you probably have the basic concept of how a freon-based air conditioner works. Visit some window air conditioner manufacturers sites ![]()
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