Best HVAC · 2026
Best Through-the-Wall Air Conditioners 2026
A through-the-wall AC slides into a wall sleeve instead of a window, so the window stays free and the seal is tighter. These are the units certified for wall mounting. Confirm your existing sleeve's opening (or buy the maker's sleeve) before you order. We rank the 32 qualifying units by CEER, then cooling BTU.
Data current as of October 23, 2026 · 32 units · source ENERGY STAR + DOE
Through-the-wall ACs you can buy on Amazon today
The 32 certified units further down don’t have their own Amazon listings. The 21 units in this section do. Pick by your outlet first: a regular 115V outlet, or a 230V outlet (a bigger plug). Then make sure the unit fits your wall sleeve, the metal box in the wall that holds the AC. Measure the sleeve’s inside width before you order.
Our picks on Amazon
Regular outlet, cooling only10,000 BTU, for rooms up to 450 sq ft. Plugs into a regular outlet. Fits sleeves 24.5 to 27 in. wide.
$529.00on Amazon
Regular outlet, with heat8,000 BTU, for rooms up to 350 sq ft. 4,200 BTU of backup heat. Plugs into a regular outlet. Fits sleeves 24.5 to 27 in. wide.
$529.99on Amazon
230V outlet, biggest room14,000 BTU, for rooms up to 700 sq ft. 13,600 BTU of backup heat. Needs a 230V outlet. Fits sleeves 26 x 20 x 15.57 in.
$679.99on Amazon
In each group, the cheapest unit sold and shipped by Amazon.com whose listing says which wall sleeve it fits. Specs are what each Amazon listing says; none of these models is on the ENERGY STAR list we rank below. The heat on these units is backup heat: Keystone and Whirlpool say not to use it as your main heat in the coldest months.
All 21 through-the-wall units on Amazon today
| Unit | Cooling | Heat | Outlet | Fits which sleeve (per the listing) | Price | |
|---|---|---|---|---|---|---|
 | LG LT0816CER | 7,800 BTU | No heat listed | Regular 115V outlet | Sleeves 24.5 to 27 in. wide | $499.00 |
 | OLMO OW-P08HS115WF | 8,000 BTU | 4,200 BTU | Regular 115V outlet | Listing doesn’t say | $438.97 |
 | OLMO OW-P08HS115WF with sleeve | 8,000 BTU | 4,200 BTU | Regular 115V outlet | Comes with its own sleeve | $499.97 |
| Whirlpool WHAT082-HAW | 8,000 BTU | 4,200 BTU | Regular 115V outlet | Sleeves 24.5 to 27 in. wide | $529.99 |
| TCL H8T91H | 8,000 BTU | 4,200 BTU | Regular 115V outlet | Sleeves 26 x 20 x 15.57 in. | $568.99 |
 | Durastar DRTAC081XNA1SLV | 8,000 BTU | No heat listed | Regular 115V outlet | Comes with its own sleeve | $638.00 |
| OLMO OW-A08AC115WF | 8,300 BTU | No heat listed | Regular 115V outlet | Listing doesn’t say | $428.97 |
| OLMO OW-A08AC115WF with sleeve | 8,300 BTU | No heat listed | Regular 115V outlet | Comes with its own sleeve | $491.97 |
 | LG LT1016CER | 9,800 BTU | No heat listed | Regular 115V outlet | Listing doesn’t say | $499.00 |
| Whirlpool WHAT101-1BW | 10,000 BTU | No heat listed | Regular 115V outlet | Sleeves 24.5 to 27 in. wide | $529.00 |
 | Keystone KSTAT12-1E | 12,000 BTU | No heat listed | Regular 115V outlet | Listing doesn’t say | $599.99 |
 | ROVSUN 10,000 BTU with heat | 10,000 BTU | 10,600 BTU | 230V outlet | Standard sleeves 25.5 in. wide | $469.99 |
| ROVSUN 12,000 BTU with heat | 12,000 BTU | 10,600 BTU | 230V outlet | Standard sleeves 25.5 in. wide | $499.99 |
 | ROVSUN 12,000 BTU G46001012 | 12,000 BTU | Yes (BTU not listed) | 230V outlet | Standard sleeves 25.5 in. wide | $569.99 |
| OLMO OW-P14AC230WF | 14,000 BTU | No heat listed | 230V outlet | Listing doesn’t say | $549.97 |
| OLMO OW-P14HS230WF | 14,000 BTU | 10,600 BTU | 230V outlet | Listing doesn’t say | $568.97 |
| OLMO OW-P14HS230WF with sleeve | 14,000 BTU | 10,600 BTU | 230V outlet | Comes with its own sleeve | $628.97 |
| Keystone KSTAT14-2D | 14,000 BTU | No heat listed | 230V outlet | Listing doesn’t say | $649.99 |
| TCL H14T9XH | 14,000 BTU | 13,600 BTU | 230V outlet | Sleeves 26 x 20 x 15.57 in. | $679.99 |
 | LG LT1430CNR | 14,000 BTU | No heat listed | 230/208V outlet | Listing doesn’t say | $699.00 |
 | Frigidaire FHTE083WA1 | 8,000 BTU | 4,200 BTU | Listing doesn’t say | Listing doesn’t say | $749.99 |
Our picks
The highest CEER (13) of the units here you can buy on Amazon today. The top of the full field is the Midea MAT08R1FWTK at CEER 14.1.
The lowest computed running cost ($80/yr) at U.S. average electricity prices.
The most cooling (14,000 BTU, ~700 sq ft) among the more efficient units here.
Each pick is chosen by a single verifiable metric (stated above) — not an opinion score. Where we can, the pick is a unit you can buy on Amazon today (1 of the 32 here is); when the top of the full field has no Amazon buy link, the pick explains why it differs. Every unit here is built for a wall sleeve — check your opening before buying. Prefer a different priority? Re-sort the full field below. Units sold under several brand names appear once. Not sure a window unit is even the right type for your room? Take the 60-second wizard.
The full field — sortable
Click any column to re-sort. Every row links to that unit's full Verified Label with computed running cost.
| Model | CEER | Cooling BTU | Room ~sq ft | $/yr | H×W×D (in) | Type | Buy | |
|---|---|---|---|---|---|---|---|---|
 | Midea MAT10R1FWTKthrough-the-wall AC · Most Efficient · inverter | 14.1 | 10,000 | 450 | $100 | 15×24×21 | Through-wall | — |
| Midea MAT10R1SWTKthrough-the-wall AC · Most Efficient · inverter | 14.1 | 10,000 | 450 | $100 | 15×24×21 | Through-wall | — |
| Midea MAT10R2FWTKthrough-the-wall AC · Most Efficient · inverter | 14.1 | 10,000 | 450 | $100 | 15×24×21 | Through-wall | — |
| Midea MAT10R2SWTKthrough-the-wall AC · Most Efficient · inverter | 14.1 | 10,000 | 450 | $100 | 15×24×21 | Through-wall | — |
| Midea MWEUTW-10CRFN8-BCN1through-the-wall AC · Most Efficient · inverter | 14.1 | 10,000 | 450 | $100 | 15×24×21 | Through-wall | — |
| Midea MWEUTW-10CRFN8-MCN1through-the-wall AC · Most Efficient · inverter | 14.1 | 10,000 | 450 | $100 | 15×24×21 | Through-wall | — |
| Seasons ST10VB1through-the-wall AC · Most Efficient · inverter | 14.1 | 10,000 | 450 | $100 | 15×24×21 | Through-wall | — |
| Seasons ST10VB2through-the-wall AC · Most Efficient · inverter | 14.1 | 10,000 | 450 | $100 | 15×24×21 | Through-wall | — |
| Midea MAT08R1FWTKthrough-the-wall AC · Most Efficient · inverter | 14.1 | 8,000 | 350 | $80 | 15×24×21 | Through-wall | — |
| Midea MAT08R1SWTKthrough-the-wall AC · Most Efficient · inverter | 14.1 | 8,000 | 350 | $80 | 15×24×21 | Through-wall | — |
| Midea MWEUTW-08CRFN8-BCN1through-the-wall AC · Most Efficient · inverter | 14.1 | 8,000 | 350 | $80 | 15×24×21 | Through-wall | — |
| Seasons ST08VB1through-the-wall AC · Most Efficient · inverter | 14.1 | 8,000 | 350 | $80 | 15×24×21 | Through-wall | — |
| Midea MAT14R2FWTKthrough-the-wall AC · Most Efficient · inverter | 13.9 | 14,000 | 700 | $142 | 15×24×21 | Through-wall | — |
| Midea MAT14R2SWTKthrough-the-wall AC · Most Efficient · inverter | 13.9 | 14,000 | 700 | $142 | 15×24×21 | Through-wall | — |
| Midea MWEUTW-14CRFN8-MCM9through-the-wall AC · Most Efficient · inverter | 13.9 | 14,000 | 700 | $142 | 15×24×21 | Through-wall | — |
| Seasons ST14VA2through-the-wall AC · Most Efficient · inverter | 13.9 | 14,000 | 700 | $142 | 15×24×21 | Through-wall | — |
| Friedrich WCVT12B30Athrough-the-wall AC · Most Efficient · inverter | 13.9 | 13,600 | 700 | $138 | 15×27×21 | Through-wall | — |
| Midea MAT12R1FWTKthrough-the-wall AC · Most Efficient · inverter | 13.9 | 12,000 | 550 | $122 | 15×24×21 | Through-wall | — |
| Midea MAT12R1SWTKthrough-the-wall AC · Most Efficient · inverter | 13.9 | 12,000 | 550 | $122 | 15×24×21 | Through-wall | — |
| Midea MAT12R2FWTKthrough-the-wall AC · Most Efficient · inverter | 13.9 | 12,000 | 550 | $122 | 15×24×21 | Through-wall | — |
| Midea MAT12R2SWTKthrough-the-wall AC · Most Efficient · inverter | 13.9 | 12,000 | 550 | $122 | 15×24×21 | Through-wall | — |
| Midea MWEUTW-12CRFN8-BCM9through-the-wall AC · Most Efficient · inverter | 13.9 | 12,000 | 550 | $122 | 15×24×21 | Through-wall | — |
| Midea MWEUTW-12CRFN8-MCM9through-the-wall AC · Most Efficient · inverter | 13.9 | 12,000 | 550 | $122 | 15×24×21 | Through-wall | — |
| Seasons ST12VB1through-the-wall AC · Most Efficient · inverter | 13.9 | 12,000 | 550 | $122 | 15×24×21 | Through-wall | — |
| Seasons ST12VB2through-the-wall AC · Most Efficient · inverter | 13.9 | 12,000 | 550 | $122 | 15×24×21 | Through-wall | — |
| Wallmaster WCVT12B30Bthrough-the-wall AC · Most Efficient · inverter | 13.9 | 11,800 | 550 | $120 | 16×27×21 | Through-wall | — |
| Friedrich WCVT12B10Athrough-the-wall AC · inverter | 13.2 | 13,500 | 700 | $144 | 15×27×21 | Through-wall | — |
| Friedrich WCVT10B30Athrough-the-wall AC · inverter | 13 | 11,100 | 450 | $121 | 15×27×21 | Through-wall | — |
 | Friedrich WCVT10B10Athrough-the-wall AC · inverter | 13 | 11,000 | 450 | $120 | 15×27×21 | Through-wall | $1,195 |
| Wallmaster WHVT14B33Bthrough-the-wall AC · Most Efficient · inverter | 12.8 | 14,300 | 700 | $158 | 16×27×21 | Through-wall | — |
| Friedrich WCVT16B30Athrough-the-wall AC · inverter | 12.6 | 16,800 | 700 | $188 | 15×27×21 | Through-wall | — |
| Friedrich WHVT14B33Athrough-the-wall AC · inverter | 12 | 15,200 | 700 | $179 | 15×27×21 | Through-wall | — |
How the ranking works. We rank room air conditioners on CEER (Combined Energy Efficiency Ratio — the DOE test number), then cooling BTU. CEER is a certified metric, not a marketing term. Certification and specs come from ENERGY STAR and the DOE compliance database; running cost and suggested room size are computed by us from published ratings and EIA U.S. average electricity prices. Suggested room size comes from ENERGY STAR’s room AC sizing chart — sunny rooms, kitchens and rooms with more than two regular users need more. Identical units sold under several brand names are collapsed to one row. No star ratings, no paid placement. These are self-install units; the Buy column links Amazon only where the unit's own listing (its model number, or a rebadge's) was in stock on our last check, so some rows have none. Prices in that column are the live Amazon price on that check; they change. See methodology.