Compared to homes with central air conditioning, homes with window units have lower cooling costs
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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? Well, not necessarily.
[1]: http://www.greenbuildingadvisor.com/sites/default/files/imagecache/blog-river/Window-mounted air conditioner - D Griebeling - 2.jpg (Photo of a room air conditioner)
[2]: http://www.greenbuildingadvisor.com/blogs/dept/musings/window-mounted-air-conditioners-save-energy
[3]: http://www.greenbuildingadvisor.com/sites/default/files/imagecache/blog-river/Window-mounted air conditioner - Traci Lawson - 2.jpg (Photo of a window-mounted air conditioner)
URL: http://www.greenbuildingadvisor.com/blogs/dept/musings/window-mounted-air-conditioners-save-energy
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