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The full database

Every AC we track — 49 units, verified specs

Real, currently-sold US models across window, portable, mini-split, and through-wall. Specs come from manufacturer data and independent testing; efficiency is shown with its true metric (CEER, EER, SEER, or SEER2) so you can compare honestly. Not sure where to start? Size your room first or jump to the sortable comparison table.

Window (18)Portable (12)Mini-split (13)Through-wall (6)
18 units

Window air conditioners

The default for most rooms — efficient, affordable, and DIY-installable.

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windmill_ac
Best design
WindowENERGY STAR

Windmill AC

4.4(1,920)
Cooling
8,300 BTU
Covers
350 ft²
Efficiency
15 CEER
Noise
50 dB
$415 est.
typical retail price
LG_LW6017R
Window

LG LW6017R

4.5(4,900)
Cooling
6,000 BTU
Covers
260 ft²
Efficiency
11.3 CEER
Noise
52 dB
$249 est.
typical retail price
Amana_AMAP061CW
WindowENERGY STAR

Amana AMAP061CW

4.3(450)
Cooling
6,000 BTU
Covers
250 ft²
Efficiency
12.1 CEER
Noise
53 dB
$229 est.
typical retail price
12 units

Portable air conditioners

No window mount needed. Best when installs are off-limits or you move it room to room.

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13 units

Mini-split air conditioners

The efficiency leaders. Quietest, cheapest to run — pro or DIY install.

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mrcoolac
Best efficiency
Mini-splitENERGY STAR

MRCOOL DIY 4th Gen 12K

4.6(1,510)
Cooling
12,000 BTU
Covers
500 ft²
Efficiency
22 SEER2
Noise
32 dB
$1099 est.
typical retail price
Mitsubishi_MZ-GS12NA
Premium pick
Mini-splitENERGY STAR

Mitsubishi MZ-GS12NA

4.8(60)
Cooling
12,000 BTU
Covers
550 ft²
Efficiency
25.6 SEER2
Noise
19 dB
$1972 est.
typical retail price
senville_ac
Mini-splitENERGY STAR

Senville AURA 12K

4.4(1,200)
Cooling
12,000 BTU
Covers
600 ft²
Efficiency
25.4 SEER2
Noise
24 dB
$1149 est.
typical retail price
6 units

Through-wall air conditioners

Permanent sleeve installs that free up your windows.

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AC database FAQs

How many AC units does CoolVerdict track?

49 current US models across window, portable, mini-split, and through-wall types, each with verified specs and per-climate running-cost estimates.

What’s the difference between CEER, EER, SEER, and SEER2?

They are efficiency ratings for different AC types — CEER and EER for window and portable units, SEER2 for mini-splits and central systems. Higher is more efficient, and we show each unit’s true metric so comparisons stay honest.

Which type of AC is most efficient?

Mini-splits generally lead on efficiency (the highest SEER2) and run the quietest, but cost more upfront and usually need professional installation. Window and portable units are cheaper and DIY-friendly — the right pick depends on your room and budget.

Prices are typical street prices and may vary. “Check Price” links go to retailer listings. See how we evaluate.