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      Best 18,000 BTU window air conditioners

      A 18,000 BTU window air conditioner suits a room of about 700-1200 sq ft.

      The most efficient of the 10 certified models is the Midea MAW18RV1KWT (16.0 CEER). A typical one draws about 1432 W and costs about $194 a year to run.

      Compare all 10 18,000 BTU window air conditioners

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      10 models, ranked by CEER (efficiency). Yearly cost at 750 hours and the U.S. average electricity price.

      #Features
      1Midea MAW18RV1KWTalso sold as 7 other model numbers18,00016.0$15225.4"230 V
      2Whirlpool WHAW182INValso sold as 1 other model number18,00016.0$15225.4"U-shaped, 230 V
      3Hisense AW1823TW3W18,00015.0$16223.6"230 V
      4Midea MAW18R2VWTalso sold as 6 other model numbers18,00015.0$16223.6"230 V
      5LG LW1822IVSM18,00014.7$16626"230 V
      6Kühl KCVM18B30B20,90014.6$19425.9"Saddle, 230 V
      7Friedrich CCV18A30Aalso sold as 3 other model numbers18,00014.4$16926"U-shaped, 230 V
      8TCL T18WQ2S18,00014.4$16925.4"U-shaped, 230 V
      9Whirlpool WHAW-181IN18,00014.4$16930"U-shaped, 230 V
      10Friedrich KCVM18B30A19,10014.4$17925.9"230 V

      More about 18,000 BTU window air conditioners

      Yearly running cost by city$25-$386

      A typical model (14.6 CEER) against the most efficient (16.0 CEER), at each city's cooling hours and state electricity price.

      CityTypicalMost efficient
      Phoenix, AZ$371$292
      Houston, TX$321$252
      Miami, FL$386$303
      Atlanta, GA$167$131
      New York, NY$213$168
      Chicago, IL$129$101
      Denver, CO$83$65
      Seattle, WA$25$20
      Is this the right size?700-1200 sq ft

      The ENERGY STAR guide gives 18,000 BTU for about 700-1200 sq ft. Adjust for your room: a heavily shaded room needs about 10% less, a very sunny one about 10% more, add 600 BTU for each person beyond two, and 4,000 BTU for a kitchen.

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      Questions4
      What is the best 18,000 BTU window air conditioner?
      On certified efficiency, the Midea MAW18RV1KWT at 16.0 CEER, about $152 a year at typical U.S. use. The best U-shaped design is the Whirlpool WHAW182INV (16.0 CEER).
      How many square feet does a 18,000 BTU window air conditioner cool?
      About 700-1200 sq ft with normal sun and two people, following the ENERGY STAR sizing guide. In a very sunny room it covers about 10% less; add 4,000 BTU if it cools a kitchen.
      How many watts does a 18,000 BTU window air conditioner use?
      Between 1125 and 1432 watts at full power for certified models, about 1432 W for a typical one. That is about $194 a year at 750 hours and the U.S. average price.
      Does a 18,000 BTU window air conditioner need a special outlet?
      Yes. All 10 certified models need a 230 V outlet on its own circuit.

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