HEMA DS-2W1822CI
window air conditioner · 18,000 BTU cooling · fits ~900 sq ft
A window AC rated 18,000 BTU — enough cooling for a room of roughly 900 square feet (the 20-BTU-per-square-foot rule).
What actually decides this purchase
We publish 17 units at 18,000 BTU. They run within $18 a year of each other — but they sell for $571 to $843, a 1.5× spread. Efficiency is not what decides this purchase at 18,000 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 18,000 BTU the field runs $571 to $843, median $640, and every one of them runs within $18 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 12th of 17 in its class. If the price you are quoted is above $640, buy something else. Worth comparing against the Keystone KSTAW182WA at $571 and the Friedrich CCV18A30A at 32 dBA for $843.
Price
Not tracked
We have no verified retail listing for this certificate. Units at this size run $571–$843.
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
Measure first
No trustworthy cabinet width on this certificate, so we will not state a fit range.
Circuit
230V needed
Needs a dedicated circuit. Budget an electrician before you buy.
We do not have price or noise or window fit 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 unit
No verified online listing
A window AC is a self-install unit: you set it in the window (or wall sleeve), no contractor or refrigerant charge needed. We have not matched a retail listing for this exact model, so we are not linking one. Search your usual retailer for the model number above — and check the certified specs here against whatever you find.
Sized for ~900 sq ft — measure your room and check your window type before you buy.
The Verified Label — every certified spec
certified 2024-12-10
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 15× 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 900 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 1,200 sq ft. Below it, 15,000 BTU (7 units) covers about 750 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 HEMA DS-2W1822CI 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 HEMA DS-2W1822CI fit my window?
The certification record doesn't publish reliable full dimensions for this unit, so measure your opening and compare against the seller's listing before you buy.
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.