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58
units compared
50
states covered
100%
independent
BTU Calculator

Size your AC in 60 seconds

320 ft²20 × 16 ft room
You need about
8,0009,000 BTU
⚡ HVAC Pulse
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33→16BTU per ft² — small rooms need double the cooling density of big ones
40%of window ACs people buy are the wrong size for the room
$300+typical yearly saving from a right-sized, efficient unit
60 secaverage time to a recommendation with our calculator
Editor-tracked

Popular units right now

Spec-matched value picks across window, portable and mini-split — chosen on the data, not paid placement.

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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

“Check Price” opens the retailer’s listing in a new tab. Prices are set by the retailer.

For installs & repairs

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4.8★+
avg. Google rating of listed pros
~50 yrs
avg. time in business
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FAQ

Common questions

Is CoolVerdict free to use?

Yes — the BTU calculator, comparison tools, buying guides, and HVAC-contractor directory are all free, with no sign-up required.

Is CoolVerdict independent?

Yes. Recommendations are based on specs and data, not paid placement — there are no sponsored rankings. Some retailer links do earn us a commission (as an Amazon Associate we earn from qualifying purchases), at no extra cost to you and with no effect on what we recommend or how units rank. See our affiliate disclosure for the details.

Where does CoolVerdict’s data come from?

Product specs come from manufacturer documentation and independent testing, shown with each unit’s true efficiency metric (CEER, EER, SEER, or SEER2). Contractor listings are compiled from public information. See How we rate.

How accurate are the running-cost estimates?

They are estimates based on each unit’s efficiency, typical usage of about 8 hours a day, and average residential electricity rates — your actual cost varies with your utility rate and habits. The calculator personalizes it to your room and state.