Antarctic StarA4211D2-10K

Portable AC · sold under 16 brands

DOE certified cooling

6,450BTU/hSACC, DOE test

Single hose · CEER 7.4

Cools rooms up to 250 sq ft

DOE data as of 2026-11-03DOE record

Does it fit your room? ENERGY STAR sizing chart

Antarctic Star A4211D2-10K: certified to DOE at 6,450 BTU/h SACC, CEER 7.4, single hose. The same unit is also filed as Auseo A4211D2-10K, COWSAR A4211D2-10K, Electactic A4211D2-10K and 12 more brands. DOE data as of 2026-11-03.

Every model number on this record

Filed with DOE under basic model A4211D2-10K. A listing with any of these numbers is this unit.

Every model number filed under basic model A4211D2-10K, DOE data as of 2026-11-03
Model numberFiled by
A4211D2-10K (DOE basic model)Antarctic Star, Auseo, COWSAR, Electactic, Fornido, FREE VILLAGE, Havato, Joy Pebble, KISSAIR, Kismile, KNDKO, Moifoi, NUAGE, R.W.FLAME, Rintuf, ZAFRO

Same unit, 16 brands

Every brand files A4211D2-10K.

Show all 16 brands

6,450 BTU/h under every name. Choose on price, warranty and what's in stock.

All 16 filed under DOE basic model A4211D2-10K. Listing status as of 2026-11-03.

Compare the 16 brands on one page

How much does the Antarctic Star A4211D2-10K cost to run?

About 16¢ an hour of cooling, or $37.99 for 30 days at 8 hours a day (less once the compressor cycles off).

6,450 BTU/h SACC divided by a CEER of 7.4 is about 872 W while cooling. Electricity at 18.16¢/kWh, the US residential average for August 2026 (EIA Electric Power Monthly, table 5.6.A). Each 1¢/kWh you pay above or below 18.16¢ moves the 8 hour figure by 7¢.

How does the Antarctic Star A4211D2-10K rank in its DOE class?

In its DOE class (single hose portable ACs), 171 models have a matched Amazon listing. 64 of them have a higher CEER than its 7.4, which is 1% above their median of 7.3.

Portable ACs that cool 250 sq ft (170 with a listing)

Among 1,044 single hose portable ACs

Cooling (SACC)6,450

Higher than 297 of 1,044. 1 other shares 6,450.

2,00016,000 BTU/h

Efficiency (CEER)7.4

Higher than 655 of 1,044. 2 others share 7.4.

4.413.4

Three to compare with

From models with a matched listing.

  • Within 1,000 BTU/h of its size, highest CEER

    Antarctic Star AC7290-10K5,500 SACC

    Up to 150 sq ft, single hose, CEER 7.9: about 6% less power for the same cooling.

  • Nearest size in its class with a higher CEER

    BLACK+DECKER BPACT08NM8,000 SACC

    Up to 350 sq ft, single hose, CEER 12: about 38% less power for the same cooling.

  • Nearest bigger unit

    Hisense HAP0825TWD8,000 SACC

    Up to 350 sq ft, dual hose, CEER 13.5.

DOE record

Cooling

Cooling capacity (SACC)
6,450 BTU/h
Efficiency (CEER)
7.4 Btu/Wh

Build

Hose setup tested
Single hoseFiled as Single-duct
Heating function
No
Condensate removal
Auto-evaporation

Record

DOE basic model
A4211D2-10K
DOE class
Single hose portable ACs
Brands on the filings
16
In DOE's list since
2026-11-02first snapshot we hold

Questions

What is the Antarctic Star A4211D2-10K's real BTU?
It's certified to DOE at 6,450 BTU/h SACC (seasonally adjusted cooling capacity), the rating DOE requires for portable ACs. A box figure labeled ASHRAE is usually higher for the same unit because it comes from a different test: SACC vs ASHRAE.
Is it single hose or dual hose?
It was tested as a single hose unit, per the DOE record.
How big a room does it cool?
About 250 sq ft. ENERGY STAR's sizing chart calls for 6,000 BTU/h in rooms up to 250 sq ft. A sunny room, a kitchen or a high ceiling needs more.
How much does the Antarctic Star A4211D2-10K cost to run for 8 hours?
About $1.27 for 8 hours of cooling: roughly 872 W at 18.16¢/kWh, the US residential average for August 2026 (EIA).
Who makes the Antarctic Star A4211D2-10K?
DOE's database has no manufacturer field, so the record doesn't say. It does show 16 brands filing one basic model, A4211D2-10K: Antarctic Star, Auseo, COWSAR and 13 more.