#1Most Efficient
Midea MWEUTW-08CRFN8-BCN1
8,000 BTU · 425.5 kWh/season
65 Through-the-Wall Air Conditioners, Ranked by Running Cost
Room air conditioners, through-the-wall mount, sold in the US, across every BTU size. Ranked cheapest to run first, estimated at 18.31¢/kWh over a 750-hour cooling season (July 2026 rate).
65 ENERGY STAR certified models, from about $78 to $183 a cooling season to run at the US average electricity rate, assuming 750 hours of cooling a year. See how we calculate running costs.
Top 5 cheapest to run
#2Most Efficient
Seasons ST08VB1
8,000 BTU · 425.5 kWh/season
#3Most Efficient
Midea MAT08R1FWTK
8,000 BTU · 425.5 kWh/season
#4Most Efficient
Midea MAT08R1SWTK
8,000 BTU · 425.5 kWh/season
#5Most Efficient
Brothers 102378
8,000 BTU · 425.5 kWh/season
All 65 models
| Rank | Brand | Model | BTU | Energy use | Est. cost/season |
|---|---|---|---|---|---|
| 1 | Midea Most Efficient | MWEUTW-08CRFN8-BCN1 | 8,000 | 425.5 kWh/season | $78 |
| 2 | Seasons Most Efficient | ST08VB1 | 8,000 | 425.5 kWh/season | $78 |
| 3 | Midea Most Efficient | MAT08R1FWTK | 8,000 | 425.5 kWh/season | $78 |
| 4 | Midea Most Efficient | MAT08R1SWTK | 8,000 | 425.5 kWh/season | $78 |
| 5 | Brothers Most Efficient | 102378 | 8,000 | 425.5 kWh/season | $78 |
| 6 | Midea Most Efficient | MT08VB1 | 8,000 | 425.5 kWh/season | $78 |
| 7 | Frigidaire Most Efficient | FHTC085WC1 | 8,000 | 425.5 kWh/season | $78 |
| 8 | Perfect Aire Most Efficient | 1PATWV8000 | 8,000 | 425.5 kWh/season | $78 |
| 9 | DuraSTAR Most Efficient | DRTAC081XVB1 | 8,000 | 425.5 kWh/season | $78 |
| 10 | Midea Most Efficient | MWEUTW-10CRFN8-BCN1 | 10,000 | 531.9 kWh/season | $97 |
| 11 | Midea Most Efficient | MWEUTW-10CRFN8-MCN1 | 10,000 | 531.9 kWh/season | $97 |
| 12 | Seasons Most Efficient | ST10VB1 | 10,000 | 531.9 kWh/season | $97 |
| 13 | Seasons Most Efficient | ST10VB2 | 10,000 | 531.9 kWh/season | $97 |
| 14 | Midea Most Efficient | MAT10R1FWTK | 10,000 | 531.9 kWh/season | $97 |
| 15 | Midea Most Efficient | MAT10R1SWTK | 10,000 | 531.9 kWh/season | $97 |
| 16 | Midea Most Efficient | MAT10R2FWTK | 10,000 | 531.9 kWh/season | $97 |
| 17 | Midea Most Efficient | MAT10R2SWTK | 10,000 | 531.9 kWh/season | $97 |
| 18 | Brothers Most Efficient | 102397 | 10,000 | 531.9 kWh/season | $97 |
| 19 | Brothers Most Efficient | 102399 | 10,000 | 531.9 kWh/season | $97 |
| 20 | Pelonis Most Efficient | PAT10R1KWT | 10,000 | 531.9 kWh/season | $97 |
| 21 | Midea Most Efficient | MT10VB1 | 10,000 | 531.9 kWh/season | $97 |
| 22 | Midea Most Efficient | MT10VB2 | 10,000 | 531.9 kWh/season | $97 |
| 23 | Frigidaire Most Efficient | FHTC105WC2 | 10,000 | 531.9 kWh/season | $97 |
| 24 | Frigidaire Most Efficient | FHTC105WC1 | 10,000 | 531.9 kWh/season | $97 |
| 25 | Perfect Aire Most Efficient | 1PATWV10000 | 10,000 | 531.9 kWh/season | $97 |
| 26 | Perfect Aire Most Efficient | 1PATWV10002 | 10,000 | 531.9 kWh/season | $97 |
| 27 | DuraSTAR Most Efficient | DRTAC101XVB1 | 10,000 | 531.9 kWh/season | $97 |
| 28 | DuraSTAR Most Efficient | DRTAC102XVB1 | 10,000 | 531.9 kWh/season | $97 |
| 29 | Friedrich Most Efficient | WCVT10B10B | 10,100 | 533.5 kWh/season | $98 |
| 30 | Friedrich | WCVT10B10A | 11,000 | 634.6 kWh/season | $116 |
| 31 | Wallmaster Most Efficient | WCVT12B30B | 11,800 | 636.7 kWh/season | $117 |
| 32 | Friedrich | WCVT10B30A | 11,100 | 640.4 kWh/season | $117 |
| 33 | Midea Most Efficient | MWEUTW-12CRFN8-BCM9 | 12,000 | 647.5 kWh/season | $119 |
| 34 | Midea Most Efficient | MWEUTW-12CRFN8-MCM9 | 12,000 | 647.5 kWh/season | $119 |
| 35 | Seasons Most Efficient | ST12VB1 | 12,000 | 647.5 kWh/season | $119 |
| 36 | Seasons Most Efficient | ST12VB2 | 12,000 | 647.5 kWh/season | $119 |
| 37 | Midea Most Efficient | MAT12R1FWTK | 12,000 | 647.5 kWh/season | $119 |
| 38 | Midea Most Efficient | MAT12R1SWTK | 12,000 | 647.5 kWh/season | $119 |
| 39 | Midea Most Efficient | MAT12R2FWTK | 12,000 | 647.5 kWh/season | $119 |
| 40 | Midea Most Efficient | MAT12R2SWTK | 12,000 | 647.5 kWh/season | $119 |
| 41 | Brothers Most Efficient | 102398 | 12,000 | 647.5 kWh/season | $119 |
| 42 | Brothers Most Efficient | 102396 | 12,000 | 647.5 kWh/season | $119 |
| 43 | Pelonis Most Efficient | PAT12R1KWT | 12,000 | 647.5 kWh/season | $119 |
| 44 | Midea Most Efficient | MT12VB1 | 12,000 | 647.5 kWh/season | $119 |
| 45 | Midea Most Efficient | MT12VB2 | 12,000 | 647.5 kWh/season | $119 |
| 46 | Frigidaire Most Efficient | FHTC125WC2 | 12,000 | 647.5 kWh/season | $119 |
| 47 | Frigidaire Most Efficient | FHTC125WC1 | 12,000 | 647.5 kWh/season | $119 |
| 48 | Perfect Aire Most Efficient | 1PATWV12000 | 12,000 | 647.5 kWh/season | $119 |
| 49 | Perfect Aire Most Efficient | 1PATWV12002 | 12,000 | 647.5 kWh/season | $119 |
| 50 | DuraSTAR Most Efficient | DRTAC121XVB1 | 12,000 | 647.5 kWh/season | $119 |
| 51 | DuraSTAR Most Efficient | DRTAC122XVB1 | 12,000 | 647.5 kWh/season | $119 |
| 52 | Friedrich Most Efficient | WCVT12B30A | 13,600 | 733.8 kWh/season | $134 |
| 53 | Midea Most Efficient | MWEUTW-14CRFN8-MCM9 | 14,000 | 755.4 kWh/season | $138 |
| 54 | Seasons Most Efficient | ST14VA2 | 14,000 | 755.4 kWh/season | $138 |
| 55 | Midea Most Efficient | MAT14R2FWTK | 14,000 | 755.4 kWh/season | $138 |
| 56 | Midea Most Efficient | MAT14R2SWTK | 14,000 | 755.4 kWh/season | $138 |
| 57 | Brothers Most Efficient | 102395 | 14,000 | 755.4 kWh/season | $138 |
| 58 | Pelonis Most Efficient | PAT14R2KWT | 14,000 | 755.4 kWh/season | $138 |
| 59 | Frigidaire Most Efficient | FHTC145WC2 | 14,000 | 755.4 kWh/season | $138 |
| 60 | Perfect Aire Most Efficient | 1PATWV14002 | 14,000 | 755.4 kWh/season | $138 |
| 61 | DuraSTAR Most Efficient | DRTAC142XVB1 | 14,000 | 755.4 kWh/season | $138 |
| 62 | Friedrich | WCVT12B10A | 13,500 | 767 kWh/season | $140 |
| 63 | Wallmaster Most Efficient | WHVT14B33B | 14,300 | 837.9 kWh/season | $153 |
| 64 | Friedrich | WHVT14B33A | 15,200 | 950 kWh/season | $174 |
| 65 | Friedrich | WCVT16B30A | 16,800 | 1000 kWh/season | $183 |