Little Home Appliance

28 6,000 BTU Window & Wall Air Conditioners, Ranked by Running Cost

Room air conditioners (window and through-the-wall) with rated cooling capacity 5,500-7,499 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).

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28 ENERGY STAR certified models, from about $52 to $60 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

#1 Window Most Efficient

Midea MAW06V1KYWT-S

6,000 BTU · 281.3 kWh/season

Est. $52/season to run

#2 Window Most Efficient

Midea MAW06S1KWT-A

6,000 BTU · 281.3 kWh/season

Est. $52/season to run

#3 Window Most Efficient

LG LW6023IVSM

6,000 BTU · 290.3 kWh/season

Est. $53/season to run

#4 Window Most Efficient

Midea MWAUQB-06CRFN8-BCN11

6,000 BTU · 298 kWh/season

Est. $55/season to run

#5 Window Most Efficient

Midea MAW06V1UWT

6,000 BTU · 298 kWh/season

Est. $55/season to run

All 28 models

Rank Brand Model Mount BTU Energy use Est. cost/season
1 Midea Most Efficient MAW06V1KYWT-S Window 6,000 281.3 kWh/season $52
2 Midea Most Efficient MAW06S1KWT-A Window 6,000 281.3 kWh/season $52
3 LG Most Efficient LW6023IVSM Window 6,000 290.3 kWh/season $53
4 Midea Most Efficient MWAUQB-06CRFN8-BCN11 Window 6,000 298 kWh/season $55
5 Midea Most Efficient MAW06V1UWT Window 6,000 298 kWh/season $55
6 Midea Most Efficient MAW06V1UBL Window 6,000 298 kWh/season $55
7 Midea Most Efficient MAW06V1QWT Window 6,000 298 kWh/season $55
8 Midea Most Efficient MAW06V1QWBL-T Window 6,000 298 kWh/season $55
9 Midea Most Efficient MAW06U1QWT Window 6,000 298 kWh/season $55
10 Hisense WCT06W25A Window 6,000 328.5 kWh/season $60
11 TCL T06WQ2S Window 6,000 328.5 kWh/season $60
12 TCL W6WC72-I Window 6,000 328.5 kWh/season $60
13 TCL W6WC72-BI Window 6,000 328.5 kWh/season $60
14 TCL H6W4KW Window 6,000 328.5 kWh/season $60
15 TCL W6WC72 Window 6,000 328.5 kWh/season $60
16 TCL W6WC72-B Window 6,000 328.5 kWh/season $60
17 TCL T06WV9R Window 6,000 328.5 kWh/season $60
18 TCL T06WV9RB Window 6,000 328.5 kWh/season $60
19 Midea MWEUWA-06CRFN8-BCM7 Window 6,000 328.5 kWh/season $60
20 Vissani VAW06V1KWTS Window 6,000 328.5 kWh/season $60
21 Seasons SW06VB1 Window 6,000 328.5 kWh/season $60
22 Midea MAW06S1VWBL-T Window 6,000 328.5 kWh/season $60
23 Midea MAW06S1VWWT-T Window 6,000 328.5 kWh/season $60
24 Frigidaire FHWC065TF1 Window 6,000 328.5 kWh/season $60
25 Frigidaire FHWC066TF1 Window 6,000 328.5 kWh/season $60
26 Perfect Aire 1PACV6000 Window 6,000 328.5 kWh/season $60
27 BLACK+DECKER BDM06C Window 6,000 328.5 kWh/season $60
28 Whirlpool WHAW061CX Window 6,000 328.5 kWh/season $60

Estimated running cost = annual kWh (ENERGY STAR's 750-cooling-hour test basis) × 18.31¢/kWh (July 2026 US average). Your own rate, climate and usage hours may be higher or lower — check your bill. ENERGY STAR figures are lab-test results; real-world use varies. This list includes discontinued and not-yet-sold certified models, and some brands are white-label relabels of the same unit.