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      12,000 BTU window air conditioner

      Richmond RMV12A10A

      Below average efficiency for its size: a CEER of 15.0 ranks #25 of 34 12,000 BTU window air conditioners.

      It cools a room of about 450-550 sq ft, draws about 800 watts and costs about $108 a year to run at typical U.S. use and prices.

      CEER
      15.0 Combined efficiency, higher is better
      Below average · beats 38%
      Cooling
      12,000 BTU/hFor about 450-550 sq ft
      Energy use
      600 kWh/yr38% less than the federal minimum
      Unit size
      18.9" wide 14.6" high, 21.5" deep, 60 lb

      A good fit if…

      • You want to plug it into an ordinary outlet - it runs on 115 V.

      Think twice if…

      • Running cost matters most - its CEER is below average for 12,000 BTU window air conditioners.
      • You also need heat - it cools only.

      Calculate my running costCheck the size for my room

      Details

      Specifications12,000 BTU, 115 V
      General
      BrandRichmond
      Model numberRMV12A10A
      TypeWindow
      DesignStandard box
      HeatingNo, cooling only
      CompressorVariable speed (inverter)
      Voltage115 V (standard outlet)
      RefrigerantR-32 (GWP 675)
      Support bracket includedNo
      On the market sinceJanuary 6, 2024
      Last certifiedJanuary 11, 2024
      Performance
      Cooling capacity12,000 BTU/h
      CEERCombined energy efficiency ratio, includes standby power15.0
      Yearly energy useENERGY STAR test: 750 hours600 kWh
      Better than federal minimum38% less energy
      ENERGY STAR Most EfficientNo
      Size
      Width × height × depth18.9" W × 14.6" H × 21.5" D
      Weight60 lb
      How it compares with 33 other 12,000 BTU window units#25 of 34
      • CEER (class median 15.0)15.0, tied with 13 others
      • Yearly cost vs. class median ($108)about the same
      • Width 18.9" (class median 20.7")narrower than 97%
      • Weight 60 lb (class median 59 lb)lighter than 39%
      • Rank among 13 similar designs#12

      Compared with the other ENERGY STAR certified 12,000 BTU window units. Yearly cost at 750 hours and 18.0¢/kWh.

      Questions6
      How many square feet does the Richmond RMV12A10A cool?
      At 12,000 BTU/h it suits a room of about 450 to 550 sq ft with normal sun and two people, following the ENERGY STAR sizing guide. In a heavily shaded room that stretches to about 495-605 sq ft; in a very sunny one it shrinks to 405-495 sq ft. A kitchen needs 4,000 BTU more.
      How many watts and amps does the Richmond RMV12A10A use?
      About 800 watts at full power (12,000 BTU/h divided by its CEER of 15.0), which is 7.0 amps at 115 V. That is 0 W less than the typical unit in its class (800 W), or $0 a year cheaper to run at 18.0¢/kWh. Its inverter compressor slows down instead of cycling, so real use is usually lower. Its CEER beats 18% of the 34 units in the class.
      Can the Richmond RMV12A10A run on a standard outlet?
      Yes. It runs on 115 V and draws about 7.0 A, well inside a standard 15 A outlet, but do not share the circuit with a space heater, microwave or other big load. 12% of certified units in this class need 230 V, so a 115 V model is the easy case.
      What are the dimensions of the Richmond RMV12A10A, and will it fit my window?
      18.9" W × 14.6" H × 21.5" D, 60 lb. It is narrower than 97% of its 33 competitors and lighter than 39% of them. The window must be wider than 18.9"; the side panels fill the remaining gap.
      Can the Richmond RMV12A10A also heat the room?
      No, it only cools. If you also need heat, 5 certified units in this class can do both; see the list of air conditioners with heat.
      Is the Richmond RMV12A10A worth buying to replace an old air conditioner?
      An old unit of the same size at 9 CEER would cost about $180 a year to run at 750 hours and 18.0¢/kWh; this one costs about $108, so it saves roughly $72 a year.

      Running cost calculator

      Pre-filled with this model. Pick your state and how many hours you run it, or see the yearly cost in every state.

      1. The air conditioner Richmond RMV12A10A
      2. How you use it
      Per year
      $169
      Per month of use
      $31
      Per day
      $1.02
      Per hour
      12.8¢
      Power draw
      800 W

      Electricity used: 1,056 kWh a yearAn old 9 CEER unit of the same size would cost $282

      Power draw is capacity divided by CEER, which already includes standby power. Inverter units often run below full power, so real use can be lower. Electricity prices: U.S. EIA residential averages (12 months to July 2026). Days a year start from your state's cooling degree days (NOAA 1991-2020 normals).

      Closest alternatives

      Units with a similar CEER in the same class, and what sets each one apart from the Richmond RMV12A10A.

      ModelCEERCompared with this one
      Midea MAW12V1QWT15.0same CEER, 6 lb lighter, U-shaped
      Hisense LWCT12W25A15.0same CEER, 1.4" wider, 4 lb lighter, U-shaped
      GE Profile PWDV12W15.0same CEER, 10 lb lighter
      TCL T12WQ2S15.0same CEER, 1.8" wider, U-shaped
      Midea MAW12V1UWT15.0same CEER

      See all 34 12,000 BTU window air conditioners, ranked

      Source: ENERGY STAR Certified Room Air Conditioners (U.S. EPA), certification of January 11, 2024. How we use the data.