DELLA 048-TL-W10KI
window air conditioner · 10,000 BTU cooling · fits ~450 sq ft
Buy the TCL T10WV9S on Amazon — $439.99 →This exact model isn't for sale on Amazon today. Same size: our pick to buy instead. Affiliate link.
A window AC rated 10,000 BTU — enough cooling for a room of up to about 450 square feet (ENERGY STAR's room AC sizing chart).
What actually decides this purchase
We publish 75 units at 10,000 BTU. They run within $27 a year of each other — but they sell for $351 to $631, a 1.8× spread. Efficiency is not what decides this purchase at 10,000 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 10,000 BTU the field runs $351 to $631, median $435, and every one of them runs within $27 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 23rd of 75 in its class. If the price you are quoted is above $435, buy something else. Worth comparing against the PHILODECO PIWC-10CRD1(ES) at $351 and the Friedrich CCV10A10A at 32 dBA for $588.
Price
Not tracked
We have no verified retail listing for this certificate. Units at this size run $351–$631.
Noise
Not published
The maker publishes no dBA figure we could verify, and noise is not part of the DOE certification. It is the most common complaint about window units, so treat its absence as a real unknown.
Window fit
≥ 21" wide
Derived from the certified cabinet width; confirm against the maker's sheet.
Circuit
Standard 115V
Plugs into a normal outlet — no electrician.
We do not have price or noise for this unit and will not estimate them. Everything above that carries a number is from a certification record or the manufacturer's own published sheet.
Buy this instead
$439.99 at Amazon
The TCL T10WV9S: 10,000 BTU, CEER 16, inverter, ENERGY STAR. We found no Amazon listing for the DELLA 048-TL-W10KI that can be bought today. This is the same size, 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 2024-04-29
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 10,000 BTU class runs within $27 a year of every other. The gap between the cheapest and dearest to buy at this size is 10× 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 10,000 BTU right for my room, or should I size up?
About 450 square feet is the guide figure, and 75 certified units sit on that shelf. The next shelf up is 11,000 BTU (4 units), about 450 sq ft. Below it, 9,000 BTU (6 units) covers about 400 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 DELLA 048-TL-W10KI fit my window?
Measure your window opening first — it needs to be at least 21" wide (the cabinet width), and the unit is about 13" tall and 19" deep, roughly 58 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.