Window ENERGY STAR

Windmill WhisperTech 10K

4.0(182) by Windmill · Model 10W2Wi
Windmill_WhisperTech_10K

Windmill's inverter generation — the design-forward chassis now with CEER 15 efficiency and a 42 dB floor.

Cooling
10,000 BTU
Covers
450 ft²
Efficiency
15 CEER
Noise
42 dB
$419 est.
typical street price · via Amazon
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Is 10,000 BTU right for your room? Run the sizing calculator

Strengths & trade-offs

Pros
  • CEER 15.0, ENERGY STAR certified
  • Inverter noise starts at 42 dB
  • Pre-assembled install kit, app and voice control
Cons
  • Premium over non-inverter 10K units
  • Thin owner-review record so far

What the Windmill WhisperTech 10K costs to run

Estimated from this unit's 15 CEER rating at 8 hours/day of cooling, using average residential electricity rates for each US climate zone. Your usage and utility rate will shift these numbers — run the calculator for your exact room.

Climate zoneExample regionsEst. cost / month
Cool North Pacific NW, Upper Midwest, New England $26 /mo
Mixed / Temperate Mid-Atlantic, Midwest, Mountain $27 /mo
Hot & Humid Southeast, Gulf Coast, Texas $22 /mo
Hot & Dry Southwest, Desert $24 /mo

Full specifications

Type Window air conditioner
Cooling capacity 10,000 BTU
Rated coverage 450 ft²
Efficiency 15 CEER
Noise (low) 42 dB
Smart features App, Voice
ENERGY STAR Yes
Model number 10W2Wi
Typical street price $419

Specs from manufacturer data; price and ratings are snapshots and may vary. See how we evaluate. Data last reviewed June 2026.

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