Little Home Appliance

34 24,000 BTU Window & Wall Air Conditioners, Ranked by Running Cost

Room air conditioners (window and through-the-wall) with rated cooling capacity 21,000-25,999 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).

← All room AC sizes

34 ENERGY STAR certified models, from about $201 to $260 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

Hisense AW2223TW3W

22,000 BTU · 1100 kWh/season

Est. $201/season to run

#2 Window Most Efficient

Friedrich KHVM24B34B

21,700 BTU · 1188 kWh/season

Est. $218/season to run

#3 Window Most Efficient

LG LW2422IVSM(208V)

23,500 BTU · 1215.5 kWh/season

Est. $223/season to run

#4 Window Most Efficient

LG LW2422IVSM(230V)

23,500 BTU · 1215.5 kWh/season

Est. $223/season to run

#5 Window Most Efficient

Kühl KCVM24B30B

23,100 BTU · 1246.4 kWh/season

Est. $228/season to run

All 34 models

Rank Brand Model Mount BTU Energy use Est. cost/season
1 Hisense Most Efficient AW2223TW3W Window 22,000 1100 kWh/season $201
2 Friedrich Most Efficient KHVM24B34B Window 21,700 1188 kWh/season $218
3 LG Most Efficient LW2422IVSM(208V) Window 23,500 1215.5 kWh/season $223
4 LG Most Efficient LW2422IVSM(230V) Window 23,500 1215.5 kWh/season $223
5 Kühl Most Efficient KCVM24B30B Window 23,100 1246.4 kWh/season $228
6 Midea Most Efficient MWCUWH-24CRFN8-MCM8 Window 24,000 1304.3 kWh/season $239
7 Midea Most Efficient MAW24S2KWT-A Window 24,000 1304.3 kWh/season $239
8 Midea Most Efficient MAW24V2KYWT-S Window 24,000 1304.3 kWh/season $239
9 Midea Most Efficient MAW24RV1KWT Window 24,000 1304.3 kWh/season $239
10 Seasons Most Efficient SW24V2 Window 24,000 1304.3 kWh/season $239
11 Frigidaire Most Efficient FHWW245WF2 Window 24,000 1304.3 kWh/season $239
12 Perfect Aire Most Efficient 1PACV24000 Window 24,000 1304.3 kWh/season $239
13 Whirlpool Most Efficient WHAW242INV Window 24,000 1304.3 kWh/season $239
14 Whirlpool Most Efficient WHHW242INV Window 24,000 1304.3 kWh/season $239
15 GE Most Efficient AWHV24***# Window 24,000 1304.3 kWh/season $239
16 Friedrich KCVM24B30A Window 23,200 1338.5 kWh/season $245
17 Frigidaire FHWW245WE2 Window 24,000 1353.4 kWh/season $248
18 Midea MAW25R2VWT Window 24,000 1353.4 kWh/season $248
19 Midea MWCUWH-24CRFN8-MCM3 Window 24,000 1353.4 kWh/season $248
20 Midea MAW24S2VWT-A Window 24,000 1353.4 kWh/season $248
21 Midea MAW24R2VWT Window 24,000 1353.4 kWh/season $248
22 Keystone KSTAW242WA Window 24,000 1353.4 kWh/season $248
23 Keplerx KBRC24RSVE2 Window 24,000 1353.4 kWh/season $248
24 Perfect Aire 1PACV25000E Window 24,000 1353.4 kWh/season $248
25 Sea Breeze WA324ZREB Window 24,000 1353.4 kWh/season $248
26 Comfort Aire RADS-253R03 Window 24,000 1353.4 kWh/season $248
27 Midea MAW24RV1CWT Window 24,000 1353.4 kWh/season $248
28 Midea MAW24S2YWT-S Window 24,000 1353.4 kWh/season $248
29 Friedrich KHVM24B34A Window 22,900 1363.1 kWh/season $250
30 Friedrich CCV24A30A Window 24,000 1417.3 kWh/season $260
31 Whirlpool WHAW-241IN Window 24,000 1417.3 kWh/season $260
32 TCL H24W4KW Window 24,000 1417.3 kWh/season $260
33 TCL H24W4KW-CA Window 24,000 1417.3 kWh/season $260
34 TCL T24WQ2S Window 24,000 1417.3 kWh/season $260

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.