TCL H12W4KW
window air conditioner · 12,000 BTU cooling · fits ~550 sq ft
Buy the TCL T12WV9S on Amazon — $489.99 →This exact model isn't for sale on Amazon today. Same size and brand: our pick to buy instead. Affiliate link.
A window AC rated 12,000 BTU — enough cooling for a room of up to about 550 square feet (ENERGY STAR's room AC sizing chart).
What actually decides this purchase
We publish 80 units at 12,000 BTU. They run within $22 a year of each other — but they sell for $490 to $559, a 1.1× spread. Efficiency is not what decides this purchase at 12,000 BTU; price, noise and whether it fits your window are. Here is where this unit lands.
We have no tracked price for this unit, so here is the rule instead. At 12,000 BTU the field runs $490 to $559, median $499, and every one of them runs within $22 a year of every other — so price is the decision and efficiency is the tiebreak. On the certified specs we do hold, this one ranks 20th of 80 in its class. If the price you are quoted is above $499, buy something else. Worth comparing against the TCL T12WV9S at $490 and the Friedrich CCV12A10A at 32 dBA.
Price
Not tracked
We have no verified retail listing for this certificate. Units at this size run $490–$559.
Noise
38–40 dBA
Manufacturer-published, not a certified test; across the 9 units at this size we have figures for, the quietest setting ranges 32–45 dBA.
Window fit
24–36" wide
From the manufacturer's submittal sheet — the range the unit is designed to fit.
Circuit
Standard 115V
Plugs into a normal outlet — no electrician.
We do not have price for this unit and will not estimate it. Everything above that carries a number is from a certification record or the manufacturer's own published sheet.
Buy this instead
$489.99 at Amazon
The TCL T12WV9S: 12,000 BTU, CEER 16, inverter, ENERGY STAR. We found no Amazon listing for the TCL H12W4KW that can be bought today. This is the same size and brand, and the most efficient match we could tie to its exact Amazon listing. The listing names this model number; we checked it was in stock, sold by Amazon.com, on 2026-10-17.
Check current price →Affiliate link. We may earn a commission — it never changes your price or our specs.
The Verified Label — every certified spec
certified 2025-01-15
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 12,000 BTU class runs within $22 a year of every other. The gap between the cheapest and dearest to buy at this size is 3× larger. Efficiency is the smallest number on this page, which is why it is not at the top of it.
Refrigerant & identity
Brand, warranty & reliability
A large Chinese electronics maker selling low-cost mini-splits; units cool well and reviewers like the smart features, but the HVAC track record is short and the North American dealer/parts network is thin.
Reliability is our read of published brand assessments (source), not a certified rating — real-world dependability hinges on a correct install more than the brand. Warranty terms are the manufacturer's (policy) and almost always require online registration within 60–90 days for the full length.
Compare similar room ACs
Frequently asked questions
Is 12,000 BTU right for my room, or should I size up?
About 550 square feet is the guide figure, and 80 certified units sit on that shelf. The next shelf up is 13,000 BTU (5 units), about 550 sq ft. Below it, 11,000 BTU (4 units) covers about 450 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.
Will the TCL H12W4KW fit my window?
Measure your window opening first — it needs to be at least 24" wide (the cabinet width), and the unit is about 16" tall and 21" deep, roughly 65 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.