The Most Efficient Room Air Conditioners

Ranked by listed annual energy use, lowest first, and grouped by kind — within a category the smallest models always win outright, which tells a family-fridge shopper nothing.

Window air conditioner

The 10 lowest of 443 certified.

Models with annual energy use and estimated running cost
			Cost a year in the U.S.
Brothers	102372	5000	$47	260.4
Frigidaire	FHWC055TF1	5000	$47	260.4
Frigidaire	FHWC056TF1	5000	$47	260.4
Midea	MAW05R1KWT-B	5000	$47	260.4
Midea	MAW05R1VWBL-T	5000	$47	260.4
Midea	MAW05R1VWWT-T	5000	$47	260.4
Midea	MAW05S1KWT-A	5000	$47	260.4
Midea	MWEUWA-05CRFN8-BCN4	5000	$47	260.4
Vissani	VAW05V1KWT	5000	$47	260.4
TCL	T05WV9M	5000	$49	273.7

10 models · cost a year at the U.S. average residential rate of 18.0¢ per kWh

Through-the-wall air conditioner

The 10 lowest of 53 certified.

Models with annual energy use and estimated running cost
			Cost a year in the U.S.
Brothers	102378Most Efficient	8000	$77	425.5
Frigidaire	FHTC085WC1Most Efficient	8000	$77	425.5
Midea	MAT08R1FWTKMost Efficient	8000	$77	425.5
Midea	MAT08R1SWTKMost Efficient	8000	$77	425.5
Midea	MT08VB1Most Efficient	8000	$77	425.5
Midea	MWEUTW-08CRFN8-BCN1Most Efficient	8000	$77	425.5
Seasons	ST08VB1Most Efficient	8000	$77	425.5
Brothers	102397Most Efficient	10000	$96	531.9
Brothers	102399Most Efficient	10000	$96	531.9
Frigidaire	FHTC105WC1Most Efficient	10000	$96	531.9

10 models · cost a year at the U.S. average residential rate of 18.0¢ per kWh

← All room air conditioners · Least efficient room air conditioners