Select 2 to 4 Items to Compare 12,000 BTU 230/208-Volt Window Air Conditioner with Cool, Heat and Remote 8001 BTU ENERGY STAR 115-Volt Electronic Through-the- Window Room Air Conditioner 12,000 BTU 1 Ton DC Inverter Ductless Mini Split Air Conditioner and Heat Pump - 120-Volt/60Hz with 25 ft. Complete Kit 8,000 BTU 115-Volt Compact Slide-Out Chassis Air Conditioner/Heat Pump with Remote Control DIY 18,000 BTU 1.5 Ton Ductless Mini-Split Air Conditioner and Heat Pump - 230V/60Hz 7,500 BTU 115-Volt Window Air Conditioner with Cool, Heat and Remote 18,000 BTU 230/208-Volt Window Air Conditioner with Cool, Heat and Remote 14,000 BTU Portable Air Conditioner with Remote Control - Black ENERGY STAR 115-Volt Electronic Room Air Conditioner 6,000 BTU 115-Volt Window Air Conditioner with Remote 11,800 BTU 230/208-Volt Through-the-Wall Air Conditioner with Heat and Remote 14,000 BTU Portable Air Conditioner with Heat 11,200 BTU 230-Volt Through-the-Wall Air Conditioner with Heat and Remote

2 Ton 13 SEER Residential Sweat A/C System with 30 ft. Line Set 8,000 BTU Portable Air Conditioner Multi-21 Zone 36,000 BTU 3.0 Ton Ductless Mini Split Air Conditioner with Heat, Inverter, Remote - 208-230-Volt/60Hz 10,000 BTU Portable Air Conditioner and Dehumidifier Function with Remote in Whitewindow ac unit in garage door 8,000 BTU 115-Volt Window Air Conditioner with Remote and ENERGY STARac unit for sliding door 23,000 BTU 230/208-Volt Window Air Conditioner with Cool, Heat and Remoteac unit for 400 sq ft HL Series 14,000 BTU Portable Air Conditioner with Remote Control - White/Gray 3 Ton 14 SEER R-410A Split System Package Air Conditioning System 10,000 BTU 3-Speed Portable Air Conditioner for 400 sq. ft.

25,000 BTU 230-Volt Window-Mounted Heavy-Duty Air Conditioner with Temperature Sensing Remote Control Did you find what you were looking for?You have successfully submitted feedback for this search. website utilizes responsive design to provide convenient experience that conforms to your devices screen size. website please follow below instructions. If you’re using Internet Explorer 8 or earlier, you will need to use an alternate browser such as Firefox or Chrome or upgrade to a newer version of internet Explorer (IE9 or greater). If you’re using Internet Explorer 9 and higher, turn off your Internet Explorer browser’s “Compatibility View settings” by following steps below: Right click at the top of your browser and make sure the “Menu Bar” option is selected Select “Tools” from the menu bar and then select “Compatibility View settings” In the pop-up menu uncheck all three boxes and click “Close” Your browser window will automatically refresh and you’ll be ready to go

Skip to Accessibility Help 10000 BTU Window Air Conditioner 12000 BTU Window Air Conditioner 12000 BTU Window Air Conditioner, Cooling & Heating 15000 BTU Window Air Conditioner 18000 BTU Window Air Conditioner 18000 BTU Window Air Conditioner, Cooling & Heating 23000 BTU Window Air Conditioner, Cooling & Heating 24500 BTU Window Air Conditioner 5000 BTU Window Air Conditioner 6000 BTU Window Air Conditioner 8000 BTU Window Air Conditioner 7500 BTU Window Air Conditioner, Cooling & HeatingImage 1 of 2 A window-mounted air conditioner could save you money. Homes that use window-mounted air conditioners use less energy for cooling than homes with central air conditioning. Window-mounted air conditioners (also called room air conditioners) aren’t particularly efficient; the best available models have an EEREnergy-efficiency rating or energy-efficiency ratio. As most commonly used, EER is the operating efficiency of a room air conditioner, measured in Btus of cooling output divided by the power consumption in watt-hours;

the higher the EER, the greater the efficiency. of about 10 or 11. Central air conditioners (also called whole-house air conditioners or split-system air conditioners) are significantly more efficient; it’s possible to buy one with an EER of 14 or even 15. So if you care about energy efficiency, you should use a central air conditioner, not a window air conditioner — right? According to the American Council for an Energy-Efficient Economy, the electricity used for home air conditioning represents almost 5% of all the electricity produced in the U.S. So if you are going to air condition your house, it would appear to make sense to buy the most efficient unit you can find. There are two metrics used to rate the efficiency of central air conditioners: the Energy Efficiency Ratio (EER) and the Seasonal Energy Efficiency RatioSeasonal Energy Efficiency Ratio (SEER) is the total cooling output (in BTU) of an air conditioner or heat pump during its normal annual usage period divided by its total energy input (in Watt-hours) during the same period.

The units of SEER are Btu/W·h. SEER measures how efficiently a residential central cooling system operates over an entire cooling season. The relationship between SEER and EER depends on location, because equipment performance varies with climate factors like air temperature and humidity. (SEER(SEER) The efficiency of central air conditioners is rated by the Seasonal Energy Efficiency Ratio. The higher the SEER rating of a unit, the more energy efficient it is. The SEER rating is Btu of cooling output during a typical hot season divided by the total electric energy in watt-hours to run the unit. For residential air conditioners, the federal minimum is 13 SEER. For an Energy Star unit, 14 SEER. Manufacturers sell 18-20 SEER units, but they are expensive.The unit for both metrics is BtuBritish thermal unit, the amount of heat required to raise one pound of water (about a pint) one degree Fahrenheit in temperature—about the heat content of one wooden kitchen match. One Btu is equivalent to 0.293 watt-hours or 1,055 joules.

GBA Encyclopedia: Cooling Options Using Ceiling Fans To Keep Cool Without AC EER is the cooling capacity of the appliance (in Btu/h) at an outdoor temperature of 95°F divided by the current draw of the appliance in watts. SEERSeasonal Energy Efficiency Ratio (SEER) is the total cooling output (in BTU) of an air conditioner or heat pump during its normal annual usage period divided by its total energy input (in Watt-hours) during the same period. is the total cooling output (in Btu) over the cooling season divided by the total electrical energy input (in watt-hours) over the cooling season. For typical residential air conditioners, EER equals about 0.875 SEER; however, this ratio varies somewhat for different air conditioner models. Unlike central air conditioners — which are rated by both EER and SEER — room air conditioners (window units) are rated only by EER. Room air conditioners that use at least 10% less energy than the federal standard are eligible for an Energy StarLabeling system sponsored by the Environmental Protection Agency and the US Department of Energy for labeling the most energy-efficient products on the market;

applies to a wide range of products, from computers and office equipment to refrigerators and air conditioners. When shopping for a room air conditioner, look for an Energy Star unit with an EER of 10.7 or more. The idea behind the SEER rating is to allow consumers to compare the seasonal efficiency (rather than the peak efficiency) of split-system air conditioners. If you are in the market for a new central air conditioner, look for an Energy Star unit with a SEER of at least 14.5 and an EER of at least 12. Some critics have noted that air conditioner manufacturers design equipment to achieve a high score on the laboratory SEER test, even when some of the engineering solutions used to achieve high test scores result in poor performance or efficiency in the field. For more information on perceived flaws in the SEER standard and SEER testing protocols, see SEER Ratings Challenged. John Proctor, the president of Proctor Engineering Group in San Rafael, California, has performed useful research into possible flaws in the SEER rating method.

Proctor (with co-author Gabriel Cohn) has publshed a paper on the topic: Two-Stage High Efficiency Air Conditioners: Laboratory Ratings vs. Residential Installation Performance. Proctor and Cohn wrote, “The increased installation of high Seasonal Energy Efficiency Ratio (SEER) air conditioners along with utility program rebates for these units prompted a study of the measured performance of these systems. This project assessed the performance of these systems in the climate zones found in the mid-Atlantic region of the U.S. ... The data were analyzed to assess the relationship between laboratory testing and real world performance. This study found causes for concern including: actual seasonal energy efficiency ratios between 59% and 84% of the rated SEERs, constant fan operation substantially degrading seasonal efficiencies and reducing dehumidification, latent loads that exceed Manual J estimates, and sensible loads substantially lower than Manual J estimates.” According to some experts, problems with the SEER rating system may make EER a more useful metric for comparing the efficiency of central air conditioners.

Even though central air conditioners are more efficient than window-mounted air conditioners, homes equipped with window-mounted air conditioners use less energy for cooling than homes with central air conditioning. For some readers, this fact will be unsurprising. After all, homes with central air conditioning usually maintain lower temperatures in more rooms than homes with window-mounted air conditioners. Other readers — including those who assume that equipment efficiency is the most important factor in energy use — may be surprised to learn that homes with window-mounted air conditioners are energy misers. For those interested in the data behind this question, I recommend a blog by fellow energy nerd Tim Grejtak, “The Fascinating World of Air Conditioner Efficiency.” According to Grejtak’s analysis, “Window ACs use less energy on a per cooling degree day and per square footage basis by a factor of 1.75.” So why do homes with window-mounted air conditioners use less energy for cooling?