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      10,100 BTU through-the-wall air conditioner

      Friedrich WCVT10B10B

      Excellent efficiency for its size: a CEER of 14.2 ranks #1 of 15 through-the-wall air conditioners.

      It cools a room of about 350-450 sq ft, draws about 711 watts and costs about $96 a year to run at typical U.S. use and prices.

      CEER
      14.2 Combined efficiency, higher is better
      Excellent · beats 97%
      Cooling
      10,100 BTU/hFor about 350-450 sq ft
      Energy use
      534 kWh/yr48% less than the federal minimum
      Unit size
      26.5" wide 15.8" high, 21" deep, 110 lb

      A good fit if…

      • You want low bills - its CEER beats 97% of through-the-wall air conditioners.
      • You want to plug it into an ordinary outlet - it runs on 115 V.
      • You want the very top tier - it meets the ENERGY STAR Most Efficient criteria.

      Think twice if…

      • You plan to install it alone - at 110 lb it is a two-person job.
      • You also need heat - it cools only.
      • You want to mount it in a window - it needs a wall sleeve.

      Calculate my running costCheck the size for my room

      Details

      Specifications10,100 BTU, 115 V
      General
      BrandFriedrich
      Model numberWCVT10B10B
      TypeThrough-the-wall
      HeatingNo, cooling only
      CompressorVariable speed (inverter)
      Voltage115 V (standard outlet)
      RefrigerantR-32 (GWP 675)
      Support bracket includedNo
      On the market sinceAugust 1, 2026
      Last certifiedAugust 19, 2026
      Performance
      Cooling capacity10,100 BTU/h
      CEERCombined energy efficiency ratio, includes standby power14.2
      Yearly energy useENERGY STAR test: 750 hours534 kWh
      Better than federal minimum48% less energy
      ENERGY STAR Most EfficientYes
      Size
      Width × height × depth26.5" W × 15.8" H × 21" D
      Weight110 lb
      How it compares with 14 other through-the-wall units#1 of 15
      • CEER (class median 13.9)14.2, no ties
      • Yearly cost vs. class median ($117)$21 less
      • Width 26.5" (class median 26.5")narrower than 0%
      • Weight 110 lb (class median 90 lb)lighter than 14%
      • Rank among 13 similar designs#1

      Compared with the other ENERGY STAR certified through-the-wall units. Yearly cost at 750 hours and 18.0¢/kWh.

      Questions6
      How many square feet does the Friedrich WCVT10B10B cool?
      At 10,100 BTU/h it suits a room of about 350 to 450 sq ft with normal sun and two people, following the ENERGY STAR sizing guide. In a heavily shaded room that stretches to about 385-495 sq ft; in a very sunny one it shrinks to 315-405 sq ft. A kitchen needs 4,000 BTU more.
      How many watts and amps does the Friedrich WCVT10B10B use?
      About 711 watts at full power (10,100 BTU/h divided by its CEER of 14.2), which is 6.2 amps at 115 V. That is 152 W less than the typical unit in its class (863 W), or $21 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 93% of the 15 units in the class.
      Can the Friedrich WCVT10B10B run on a standard outlet?
      Yes. It runs on 115 V and draws about 6.2 A, well inside a standard 15 A outlet, but do not share the circuit with a space heater, microwave or other big load. 60% of certified units in this class need 230 V, so a 115 V model is the easy case.
      What are the dimensions of the Friedrich WCVT10B10B, and will it fit my window?
      26.5" W × 15.8" H × 21" D, 110 lb. It is narrower than 0% of its 14 competitors and lighter than 14% of them. It slides into a wall sleeve, so compare the sleeve opening with the unit before buying.
      Can the Friedrich WCVT10B10B also heat the room?
      No, it only cools. If you also need heat, 2 certified units in this class can do both; see the list of air conditioners with heat.
      Is the Friedrich WCVT10B10B worth buying to replace an old air conditioner?
      An old unit of the same size at 9 CEER would cost about $152 a year to run at 750 hours and 18.0¢/kWh; this one costs about $96, so it saves roughly $56 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 Friedrich WCVT10B10B
      2. How you use it
      Per year
      $150
      Per month of use
      $27
      Per day
      $0.91
      Per hour
      11.4¢
      Power draw
      711 W

      Electricity used: 939 kWh a yearAn old 9 CEER unit of the same size would cost $237

      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 Friedrich WCVT10B10B.

      ModelCEERCompared with this one
      Midea MT08VB114.10.1 CEER lower, 2.4" narrower, 56 lb lighter
      Midea MT10VB114.10.1 CEER lower, 2.4" narrower, 54 lb lighter
      Midea MT12VB113.90.3 CEER lower, 2.4" narrower, 51 lb lighter
      Wallmaster WCVT12B30B13.90.3 CEER lower, 230 V
      Midea MT10VB214.10.1 CEER lower, 2.4" narrower, 54 lb lighter, 230 V

      See all 15 through-the-wall air conditioners, ranked

      Source: ENERGY STAR Certified Room Air Conditioners (U.S. EPA), certification of August 19, 2026. How we use the data.