Keystone KSTAW182WA
window air conditioner · 18,000 BTU cooling · fits ~1,000 sq ft
Buy the Keystone KSTAW182WA on Amazon — $656.99 →This exact model. Affiliate link.
A window AC rated 18,000 BTU — enough cooling for a room of up to about 1,000 square feet (ENERGY STAR's room AC sizing chart).
Buy this unit
$656.99 at Amazon
A window AC is a self-install unit: you set it in the window (or wall sleeve), no contractor or refrigerant charge needed. We matched this exact model’s Amazon listing — price shown was current at our last data refresh.
Sized for ~1,000 sq ft — measure your room and check your window type before you buy.
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The Verified Label — every certified spec
certified 2024-11-14
status: Active
Cooling & efficiency — source: ENERGY STAR / DOE
Fit & install — does it fit your window?
Efficiency & running cost — computed by Verified HVAC Data
Worth keeping in proportion: every unit in the 18,000 BTU class runs within $18 a year of every other. The gap between the cheapest and dearest to buy at this size is 11× larger. Efficiency is the smallest number on this page, which is why it is not at the top of it.
Refrigerant & identity
Compare similar room ACs
Frequently asked questions
Is 18,000 BTU right for my room, or should I size up?
About 1,000 square feet is the guide figure, and 17 certified units sit on that shelf. The next shelf up is 24,000 BTU (22 units), about 1,500 sq ft. Below it, 15,000 BTU (7 units) covers about 700 sq ft. Between two shelves, take the smaller one: oversizing is the usual reason a unit cools but leaves the room clammy, which our sizing calculator explains.
Does the Keystone KSTAW182WA need a special outlet?
Yes. It runs on 230 volts, not the 115-volt outlet a bedroom or living room normally has, so it needs a dedicated circuit installed by an electrician. Budget for that before you buy: most units in its 18,000 BTU class are 115-volt, so a same-size alternative may avoid the wiring entirely.
Will the Keystone KSTAW182WA fit my window?
Measure your window opening first — it needs to be at least 24" wide (the cabinet width), and the unit is about 18" tall and 25" deep, roughly 96 lb. Most double-hung windows fit units in this range with the included side panels, but confirm your window's inside width and minimum height.
Sources. Certification and CEER from ENERGY STAR room-AC data and the DOE compliance certification database. Cooling capacity, dimensions and refrigerant are the manufacturer-certified values. Annual running cost, suggested room size and the percentile are computed by Verified HVAC Data from published ratings and EIA U.S. average electricity prices — see our methodology. Refrigerant GWP is the IPCC value. We publish no star ratings and take no payment for placement. "Not published" means the source registry doesn't disclose it — we never fill a spec with a guess.