In a conventional room air conditioner, the compressor works either at maximum capacity when the room thermostat calls for cooling or off when the desired temperature has been achieved, typically alternating frequently between full on and off. What are room air conditioners with variable speed technology? Environmentally friendly: Some ENERGY STAR room air conditioners come with an EPA-approved refrigerant called R-32, which has a much lower impact on the climate-two-thirds lower than the refrigerant used in other ACs.ENERGY STAR models with connected functionality give you additional convenience, comfort, and savings with the ability to turn off the unit remotely, schedule temperature changes, and even receive feedback on the energy use of your unit. Connected functionality: Some air conditioners offer great new features.Certified units feature tight-fitting side panels that minimize costly and uncomfortable air leaks. Look for the ENERGY STAR: Models that have earned EPA’s ENERGY STAR are independently certified to save energy, come with clearer instructions, and better materials to improve sealing and insulation around the unit.Once you have chosen the right sized unit, here are a couple of other things to think about. Once you have a total, round down to the nearest thousand-that’s the number you should look for when choosing your unit.įEATURES: What other features are available?.If you are mounting an air conditioner near the corner of a room, look for a unit that can send the airflow in the right direction. If the unit is used in a kitchen, increase capacity by 4,000 BTUs.If more than two people regularly occupy the room, add 600 BTUs for each additional person.If the room is very sunny, increase capacity by 10 percent.If the room is heavily shaded, reduce capacity by 10 percent.Once you have that number, you’ll want to make capacity adjustments depending on what is typically happening in that room.For example, 147.5 sq ft would need 5,000 BTUs.Cooling capacity is measured in BTUs (British thermal units) per hour.Look up the recommended cooling capacity for your room size using the table below.For example: a rectangular room that is 14 ft, 9 inches long and 10 ft wide would be 147.5 sq ft (14.75 ft x 10 ft = 147.5 sq ft).Complex room shapes: Sub-divide into squares, rectangles and triangles. Then use the formulas above to determine the total square footage.Triangular rooms: Multiply the length of the area by the width and divide by two.Square and rectangular rooms: Multiply the length of the room by the width.
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