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      23,500 BTU window air conditioner

      LG LW2422IVSM

      Excellent efficiency for its size: a CEER of 14.5 ranks #2 of 17 24,000 BTU and up window air conditioners.

      It cools a room of about 1000-1500 sq ft, draws about 1621 watts and costs about $219 a year to run at typical U.S. use and prices.

      CEER
      14.5 Combined efficiency, higher is better
      Excellent · beats 91%
      Cooling
      23,500 BTU/hFor about 1000-1500 sq ft
      Energy use
      1,216 kWh/yr54% less than the federal minimum
      Unit size
      26" wide 17.7" high, 30.7" deep, 112 lb

      A good fit if…

      • You want low bills - its CEER beats 91% of 24,000 BTU and up window air conditioners.
      • You want the window view kept - the unit hangs over the sill, with the bulk outside and below the window.
      • You want the very top tier - it meets the ENERGY STAR Most Efficient criteria.

      Think twice if…

      • You only have ordinary outlets - it needs a 230 V circuit and plug.
      • You plan to install it alone - at 112 lb it is a two-person job.
      • You also need heat - it cools only.

      Calculate my running costCheck the size for my room

      Details

      Specifications23,500 BTU, 230 V
      General
      BrandLG
      Model numberLW2422IVSM
      TypeWindow
      DesignSaddle (hangs over the sill)
      HeatingNo, cooling only
      CompressorVariable speed (inverter)
      Voltage230 V (needs a 230 V outlet)
      RefrigerantR-32 (GWP 675)
      Support bracket includedYes
      On the market sinceJuly 24, 2023
      Last certifiedSeptember 27, 2023
      Performance
      Cooling capacity23,500 BTU/h
      CEERCombined energy efficiency ratio, includes standby power14.5
      Yearly energy useENERGY STAR test: 750 hours1,216 kWh
      Better than federal minimum54% less energy
      ENERGY STAR Most EfficientYes
      Size
      Width × height × depth26" W × 17.7" H × 30.7" D
      Weight112 lb
      How it compares with 16 other 24,000 BTU and up window units#2 of 17
      • CEER (class median 13.3)14.5, no ties
      • Yearly cost vs. class median ($256)$36 less
      • Width 26" (class median 26")narrower than 44%
      • Weight 112 lb (class median 130 lb)lighter than 69%
      • Rank among 4 similar designs (saddle)#1

      Compared with the other ENERGY STAR certified 24,000 BTU and up window units. Yearly cost at 750 hours and 18.0¢/kWh.

      Questions7
      How many square feet does the LG LW2422IVSM cool?
      At 23,500 BTU/h it suits a room of about 1000 to 1500 sq ft with normal sun and two people, following the ENERGY STAR sizing guide. In a heavily shaded room that stretches to about 1100-1650 sq ft; in a very sunny one it shrinks to 900-1350 sq ft. A kitchen needs 4,000 BTU more.
      How many watts and amps does the LG LW2422IVSM use?
      About 1621 watts at full power (23,500 BTU/h divided by its CEER of 14.5), which is 7.0 amps at 230 V. That is 269 W less than the typical unit in its class (1890 W), or $36 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 88% of the 17 units in the class.
      What outlet does the LG LW2422IVSM need?
      It is a 230 V unit that draws 7.0 A, so it needs its own 230 V circuit with a matching plug (typically NEMA 6-15 or 6-20). If the room has only ordinary 115 V outlets, an electrician has to add one. Only 100% of the 17 certified units in this class are 230 V.
      What are the dimensions of the LG LW2422IVSM, and will it fit my window?
      26" W × 17.7" H × 30.7" D, 112 lb. It is narrower than 44% of its 16 competitors and lighter than 69% of them. It hangs over the sill, so check the sill depth and that the window can open far enough to set the unit in.
      Is the LG LW2422IVSM saddle design an advantage?
      For the view, yes: most of the body sits outside and below the sill, so it blocks less of the window than a box unit. At 112 lb, support it from outside until the bracket is fixed.
      Can the LG LW2422IVSM also heat the room?
      No, it only cools. If you also need heat, 3 certified units in this class can do both; see the list of air conditioners with heat.
      Is the LG LW2422IVSM worth buying to replace an old air conditioner?
      An old unit of the same size at 9 CEER would cost about $353 a year to run at 750 hours and 18.0¢/kWh; this one costs about $219, so it saves roughly $134 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 LG LW2422IVSM
      2. How you use it
      Per year
      $342
      Per month of use
      $62
      Per day
      $2.07
      Per hour
      25.9¢
      Power draw
      1621 W

      Electricity used: 2,139 kWh a yearAn old 9 CEER unit of the same size would cost $551

      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 LG LW2422IVSM.

      ModelCEERCompared with this one
      Kühl+ KHVL28B35B14.20.3 CEER lower, 2" wider, 48 lb heavier, also heats
      Hisense AW2223TW3W15.00.5 CEER higher, 2.4" narrower, 25 lb lighter, standard box
      Kühl KCVM24B30B13.90.6 CEER lower, 18 lb heavier
      Midea MAW24RV1KWT13.80.7 CEER lower, 0.6" narrower, 11 lb lighter, standard box
      Whirlpool WHAW242INV13.80.7 CEER lower, 0.6" narrower, 11 lb lighter, U-shaped

      See all 17 24,000 BTU and up window air conditioners, ranked

      Source: ENERGY STAR Certified Room Air Conditioners (U.S. EPA), certification of September 27, 2023. How we use the data.