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Best Window-Straddling (U-Shaped) Window Air Conditioners (2026)

Window air conditioners whose official ENERGY STAR records list a mounting type that straddles the window or windowsill, ranked on the same published-spec score as the main comparison.

Updated 2026-11-133 picksFull window air conditioners ranking

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  1. 1
    Highest published-spec match in this shortlist

    Midea MAH09W1AGR

    Score is within our window air conditioners ranking
    8.4/10

    9500 Btu/h; CEER 17.6; ENERGY STAR Most Efficient; window-straddling install; heating mode.

    What we like

    • Highest official ENERGY STAR CEER in this comparison (17.6)
    • Marked ENERGY STAR Most Efficient on the official record
    • ENERGY STAR lists a window-straddling installation (typical of U-shaped designs)
    • ENERGY STAR lists a heating mode

    Watch out for

    • No additional scored gaps in the official record we used
    Check price at AmazonFull specs & sources
  2. 2
    Closely related alternative

    Friedrich KCVM14B10B

    Score is within our window air conditioners ranking
    7.3/10

    14100 Btu/h; CEER 16.2; ENERGY STAR Most Efficient; window-straddling install.

    What we like

    • Official ENERGY STAR CEER of 16.2
    • Marked ENERGY STAR Most Efficient on the official record
    • ENERGY STAR lists a window-straddling installation (typical of U-shaped designs)

    Watch out for

    • ENERGY STAR does not list a heating mode
    Check price at AmazonFull specs & sources
  3. 3
    Another official-spec alternative

    Friedrich Kühl KHVS10B11B

    Score is within our window air conditioners ranking
    7.1/10

    10600 Btu/h; CEER 15; ENERGY STAR Most Efficient; window-straddling install; heating mode.

    What we like

    • Marked ENERGY STAR Most Efficient on the official record
    • ENERGY STAR lists a window-straddling installation (typical of U-shaped designs)
    • ENERGY STAR lists a heating mode

    Watch out for

    • No additional scored gaps in the official record we used
    Check price at AmazonFull specs & sources

Keep comparing

Full rankingBest Window Air Conditioners (2026) Buying guideBest ENERGY STAR Most Efficient Window Air Conditioners (2026) Head-to-headMidea MAH09W1AGR vs Friedrich KCVM14B10BHead-to-headMidea MAH09W1AGR vs Friedrich Kühl KHVS10B11BHead-to-headFriedrich KCVM14B10B vs Friedrich Kühl KHVS10B11B TopicWindow Air Conditioners