#1 Window Most Efficient
Hisense AW-12TW1RZAU70
11,500 BTU · 539.1 kWh/season
135 12,000 BTU Window & Wall Air Conditioners, Ranked by Running Cost
Room air conditioners (window and through-the-wall) with rated cooling capacity 11,500-13,499 BTU/h, sold in the US. Window and through-the-wall units are mixed and tagged below. Ranked cheapest to run first, estimated at 18.31¢/kWh over a 750-hour cooling season (July 2026 rate).
135 ENERGY STAR certified models, from about $99 to $124 a cooling season to run at the US average electricity rate. This assumes 750 hours of cooling a year, ENERGY STAR's test assumption for a typical season — not continuous, year-round use. See how we calculate running costs.
Top 5 cheapest to run
#2 Window Most Efficient
Hisense AWUS1227TW
11,500 BTU · 539.1 kWh/season
#3 Window Most Efficient
TCL W12WC72
12,000 BTU · 562.5 kWh/season
#4 Window Most Efficient
TCL W12WC72-B
12,000 BTU · 562.5 kWh/season
#5 Window Most Efficient
TCL T12WV4S
12,000 BTU · 562.5 kWh/season
All 135 models
| Rank | Brand | Model | Mount | BTU | Energy use | Est. cost/season |
|---|---|---|---|---|---|---|
| 1 | Hisense Most Efficient | AW-12TW1RZAU70 | Window | 11,500 | 539.1 kWh/season | $99 |
| 2 | Hisense Most Efficient | AWUS1227TW | Window | 11,500 | 539.1 kWh/season | $99 |
| 3 | TCL Most Efficient | W12WC72 | Window | 12,000 | 562.5 kWh/season | $103 |
| 4 | TCL Most Efficient | W12WC72-B | Window | 12,000 | 562.5 kWh/season | $103 |
| 5 | TCL Most Efficient | T12WV4S | Window | 12,000 | 562.5 kWh/season | $103 |
| 6 | TCL Most Efficient | T12WV9S | Window | 12,000 | 562.5 kWh/season | $103 |
| 7 | TCL Most Efficient | T12WV9SB | Window | 12,000 | 562.5 kWh/season | $103 |
| 8 | Midea Most Efficient | MWEUWA-12CRFN8-BCP0 | Window | 12,000 | 562.5 kWh/season | $103 |
| 9 | Midea Most Efficient | MAW12V1WBK-T | Window | 12,000 | 562.5 kWh/season | $103 |
| 10 | Midea Most Efficient | MAW12V1WBK | Window | 12,000 | 562.5 kWh/season | $103 |
| 11 | Midea Most Efficient | MAW12V1WWT | Window | 12,000 | 562.5 kWh/season | $103 |
| 12 | Midea Most Efficient | MAW12V1WWT-T | Window | 12,000 | 562.5 kWh/season | $103 |
| 13 | Midea Most Efficient | MWAUQB-12CRFN8-BCP0 | Window | 12,000 | 562.5 kWh/season | $103 |
| 14 | Midea Most Efficient | MAW12U1KWT | Window | 12,000 | 562.5 kWh/season | $103 |
| 15 | Midea Most Efficient | MAW12U1KWT-A | Window | 12,000 | 562.5 kWh/season | $103 |
| 16 | Midea Most Efficient | MAW12V1KYWT-S | Window | 12,000 | 562.5 kWh/season | $103 |
| 17 | Midea Most Efficient | MWFUWA-12CRFN8-BCP0 | Window | 12,000 | 562.5 kWh/season | $103 |
| 18 | Vissani Most Efficient | VAW12V1KWTS | Window | 12,000 | 562.5 kWh/season | $103 |
| 19 | Brothers Most Efficient | 102073 | Window | 12,000 | 562.5 kWh/season | $103 |
| 20 | Midea Most Efficient | MAW12RV1KWT | Window | 12,000 | 562.5 kWh/season | $103 |
| 21 | Midea Most Efficient | MAW12U1KWT-M | Window | 12,000 | 562.5 kWh/season | $103 |
| 22 | Seasons Most Efficient | SW12VB1 | Window | 12,000 | 562.5 kWh/season | $103 |
| 23 | Frigidaire Most Efficient | FHWW125WF1 | Window | 12,000 | 562.5 kWh/season | $103 |
| 24 | Frigidaire Most Efficient | FHWW126WF1 | Window | 12,000 | 562.5 kWh/season | $103 |
| 25 | Frigidaire Most Efficient | GHWW125TF1 | Window | 12,000 | 562.5 kWh/season | $103 |
| 26 | Midea Most Efficient | MAW12S1KWT-A | Window | 12,000 | 562.5 kWh/season | $103 |
| 27 | Perfect Aire Most Efficient | 1PACV12000 | Window | 12,000 | 562.5 kWh/season | $103 |
| 28 | BLACK+DECKER Most Efficient | BDM12C | Window | 12,000 | 562.5 kWh/season | $103 |
| 29 | DuraSTAR Most Efficient | DRWAC121XVB1 | Window | 12,000 | 562.5 kWh/season | $103 |
| 30 | Whirlpool Most Efficient | WHAW121CWX | Window | 12,000 | 562.5 kWh/season | $103 |
| 31 | Whirlpool Most Efficient | WHAW121INV | Window | 12,000 | 562.5 kWh/season | $103 |
| 32 | GE Most Efficient | AWHV12***# | Window | 12,000 | 562.5 kWh/season | $103 |
| 33 | Kühl Most Efficient | KCVS12B30B | Window | 12,700 | 567 kWh/season | $104 |
| 34 | Kühl Most Efficient | KCVS12B10B | Window | 12,300 | 569.4 kWh/season | $104 |
| 35 | GREE | GJC12BU-A6DRNJ2A | Window | 11,500 | 586.7 kWh/season | $107 |
| 36 | House Kobo | KOBOGJC12BU | Window | 11,500 | 586.7 kWh/season | $107 |
| 37 | Midea | 1010451379 | Window | 12,000 | 592.1 kWh/season | $108 |
| 38 | Midea | MAW12U1QWT | Window | 12,000 | 592.1 kWh/season | $108 |
| 39 | Midea | MWAUQB-12CRFN8-BCN12 | Window | 12,000 | 592.1 kWh/season | $108 |
| 40 | Midea | MAW12U2QWT | Window | 12,000 | 592.1 kWh/season | $108 |
| 41 | TCL | KCR-35/YXRDBp(E1/6)(080002) | Window | 12,000 | 592.1 kWh/season | $108 |
| 42 | TCL | H12W4KWH | Window | 12,000 | 592.1 kWh/season | $108 |
| 43 | TCL | H12W4KWH-CA | Window | 12,000 | 592.1 kWh/season | $108 |
| 44 | Midea | 1014278205 | Window | 12,000 | 592.1 kWh/season | $108 |
| 45 | GE | AHTR12ACH2 | Window | 12,200 | 594.2 kWh/season | $109 |
| 46 | Kühl Most Efficient | KHVS12B33B | Window | 12,600 | 598.1 kWh/season | $110 |
| 47 | Perfect Aire | 1PACU12000 | Window | 12,000 | 600 kWh/season | $110 |
| 48 | Midea | MAW12V1QWT | Window | 12,000 | 600 kWh/season | $110 |
| 49 | Midea | MAW12V1QWT-M | Window | 12,000 | 600 kWh/season | $110 |
| 50 | Midea | MAW12AV1QWT | Window | 12,000 | 600 kWh/season | $110 |
| 51 | Midea | MW12MSWBA5RCM | Window | 12,000 | 600 kWh/season | $110 |
| 52 | Midea | MW12MSWBA6RCM | Window | 12,000 | 600 kWh/season | $110 |
| 53 | Comfort Aire | RXTS-121A | Window | 12,000 | 600 kWh/season | $110 |
| 54 | Frigidaire | GHWQ125WD1 | Window | 12,000 | 600 kWh/season | $110 |
| 55 | Frigidaire | GHWQ123WC1 | Window | 12,000 | 600 kWh/season | $110 |
| 56 | LG | LW1222IVSM | Window | 12,000 | 600 kWh/season | $110 |
| 57 | Midea | MAW12AV1QWT-C | Window | 12,000 | 600 kWh/season | $110 |
| 58 | Vissani | VAWA12V4HWT | Window | 12,000 | 600 kWh/season | $110 |
| 59 | LG | LW1224IVSM | Window | 12,000 | 600 kWh/season | $110 |
| 60 | GE | PWDV12W**# | Window | 12,000 | 600 kWh/season | $110 |
| 61 | Frigidaire | FHWW125WE1 | Window | 12,000 | 600 kWh/season | $110 |
| 62 | TCL | H12W4MW | Window | 12,000 | 600 kWh/season | $110 |
| 63 | Danby | DAC120ECBIWDB | Window | 12,000 | 600 kWh/season | $110 |
| 64 | Midea | MAW12V1YWT-S | Window | 12,000 | 600 kWh/season | $110 |
| 65 | Richmond | RMV12A10A | Window | 12,000 | 600 kWh/season | $110 |
| 66 | Friedrich | CCV12A10A | Window | 12,000 | 600 kWh/season | $110 |
| 67 | Keystone | KSTAW12INV | Window | 12,000 | 600 kWh/season | $110 |
| 68 | BLACK+DECKER | BD12NWES | Window | 12,000 | 600 kWh/season | $110 |
| 69 | Della | 048-TL-W12KI | Window | 12,000 | 600 kWh/season | $110 |
| 70 | Zafro | A8503W-12K | Window | 12,000 | 600 kWh/season | $110 |
| 71 | Hykolity | ACB-2603 | Window | 12,000 | 600 kWh/season | $110 |
| 72 | Whirlpool | WHAW-121IN | Window | 12,000 | 600 kWh/season | $110 |
| 73 | Midea | MWCUWA-12CRFN8-BCN10 | Window | 12,000 | 600 kWh/season | $110 |
| 74 | Midea | MWAUQB-12CRFN8-BCN10 | Window | 12,000 | 600 kWh/season | $110 |
| 75 | Rovsun | TIWC-12CRD1 | Window | 12,000 | 600 kWh/season | $110 |
| 76 | Zokop | TIWC-12CRD1 | Window | 12,000 | 600 kWh/season | $110 |
| 77 | Century | RXTS-121A | Window | 12,000 | 600 kWh/season | $110 |
| 78 | Frigidaire | GHWW125TE1 | Window | 12,000 | 600 kWh/season | $110 |
| 79 | Midea | MAW12S1VWT-A | Window | 12,000 | 600 kWh/season | $110 |
| 80 | Midea | MAW12W1QWT | Window | 12,000 | 600 kWh/season | $110 |
| 81 | Keystone | KSTAW121WA | Window | 12,000 | 600 kWh/season | $110 |
| 82 | Hisense | AWL1225TW1W | Window | 12,000 | 600 kWh/season | $110 |
| 83 | Hisense | LWCT12W25A | Window | 12,000 | 600 kWh/season | $110 |
| 84 | Vissani | VWL1225T | Window | 12,000 | 600 kWh/season | $110 |
| 85 | Hisense | WAWL1225TW1W | Window | 12,000 | 600 kWh/season | $110 |
| 86 | Keplerx | KARC12RSVE1 | Window | 12,000 | 600 kWh/season | $110 |
| 87 | Midea | MAW12S1VWWT-T | Window | 12,000 | 600 kWh/season | $110 |
| 88 | Ktaxon | TIWC-12CRD1 | Window | 12,000 | 600 kWh/season | $110 |
| 89 | Hisense | AHLW1225TW1W | Window | 12,000 | 600 kWh/season | $110 |
| 90 | Midea | MAW12RV1CWT | Window | 12,000 | 600 kWh/season | $110 |
| 91 | Midea | MAW12V1QWT-S | Window | 12,000 | 600 kWh/season | $110 |
| 92 | TCL | H12W4KW | Window | 12,000 | 600 kWh/season | $110 |
| 93 | TCL | H12W4KW-CA | Window | 12,000 | 600 kWh/season | $110 |
| 94 | Midea | MAW12AV1UWT-C | Window | 12,000 | 600 kWh/season | $110 |
| 95 | Midea | MAW12V1UWT | Window | 12,000 | 600 kWh/season | $110 |
| 96 | TCL | T12WQ2S | Window | 12,000 | 600 kWh/season | $110 |
| 97 | Philodeco | PIWC-12CRD1(ES) | Window | 12,000 | 600 kWh/season | $110 |
| 98 | Rovsun | RVTIW-12CRD1 | Window | 12,000 | 600 kWh/season | $110 |
| 99 | Ktaxon | KXTIW-12CRD1 | Window | 12,000 | 600 kWh/season | $110 |
| 100 | Midea | 1014634874 | Window | 12,000 | 600 kWh/season | $110 |
| 101 | Hykolity | ACB-2623 | Window | 12,000 | 600 kWh/season | $110 |
| 102 | Element | EHWR12BE | Window | 12,000 | 600 kWh/season | $110 |
| 103 | Hisense | AAW12TW26 | Window | 12,000 | 600 kWh/season | $110 |
| 104 | GE | PHNT12CCH1 | Window | 12,200 | 622.4 kWh/season | $114 |
| 105 | Friedrich | KCVS12B10A | Window | 12,500 | 625 kWh/season | $114 |
| 106 | Midea Most Efficient | MWAUQB-12HRFN8-BCN4 | Window | 12,000 | 625 kWh/season | $114 |
| 107 | Midea Most Efficient | MAW12HV1KWT-A | Window | 12,000 | 625 kWh/season | $114 |
| 108 | DuraSTAR Most Efficient | DRWHPC121XVB1 | Window | 12,000 | 625 kWh/season | $114 |
| 109 | Friedrich | KCVS12B30A | Window | 12,700 | 635 kWh/season | $116 |
| 110 | Wallmaster Most Efficient | WCVT12B30B | Through-the-wall | 11,800 | 636.7 kWh/season | $117 |
| 111 | Midea Most Efficient | MWEUTW-12CRFN8-BCM9 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 112 | Midea Most Efficient | MWEUTW-12CRFN8-MCM9 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 113 | Seasons Most Efficient | ST12VB1 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 114 | Seasons Most Efficient | ST12VB2 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 115 | Midea Most Efficient | MAT12R1FWTK | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 116 | Midea Most Efficient | MAT12R1SWTK | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 117 | Midea Most Efficient | MAT12R2FWTK | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 118 | Midea Most Efficient | MAT12R2SWTK | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 119 | Brothers Most Efficient | 102398 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 120 | Brothers Most Efficient | 102396 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 121 | Pelonis Most Efficient | PAT12R1KWT | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 122 | Midea Most Efficient | MT12VB1 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 123 | Midea Most Efficient | MT12VB2 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 124 | Frigidaire Most Efficient | FHTC125WC2 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 125 | Frigidaire Most Efficient | FHTC125WC1 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 126 | Perfect Aire Most Efficient | 1PATWV12000 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 127 | Perfect Aire Most Efficient | 1PATWV12002 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 128 | DuraSTAR Most Efficient | DRTAC121XVB1 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 129 | DuraSTAR Most Efficient | DRTAC122XVB1 | Through-the-wall | 12,000 | 647.5 kWh/season | $119 |
| 130 | Friedrich Most Efficient | KHVS12B33A | Window | 12,600 | 656.3 kWh/season | $120 |
| 131 | Lubeck | 57H-ID0-B12HRFN8BCL0 | Window | 12,000 | 676.7 kWh/season | $124 |
| 132 | Keystone | KSTAW12INV-HC | Window | 12,000 | 676.7 kWh/season | $124 |
| 133 | Midea | MWAUQB-12HRFN8-BCL0 | Window | 12,000 | 676.7 kWh/season | $124 |
| 134 | Midea | MAW12HV1CWT | Window | 12,000 | 676.7 kWh/season | $124 |
| 135 | Midea | MAW12HV1CWT-A | Window | 12,000 | 676.7 kWh/season | $124 |