Which window air conditioner fits your window?

Measure the open window: width inside the frame, and height with the sash raised (or slid) as far as it goes. A unit fits when your width sits inside its minimum–maximum range and your height is at least its minimum. Slider and casement windows need a tall, narrow unit; most standard units need about 23″ of width.

Window type Opening width (inches) Opening height (inches)

Enter your window's width and height to see the units that fit.

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Every unit we list, with its maker's window range

20 models. Opening ranges are copied from each manufacturer's product page or installation manual (linked). Units whose maker publishes no range are not listed. Always check the manual for your exact model before buying.

Unit	Width	Min height
Frigidaire FFRE0533U1 Standard (double-hung) · 5,000 BTU · maker spec	22–36″	13.25″
LG LW6019ER Standard (double-hung) · 6,000 BTU · maker spec	22–36″	13″
Midea MWA06CR71 Standard (double-hung) · 6,000 BTU · maker spec	23–36″	14″
Windmill 6,000 BTU Original Standard (double-hung) · 6,000 BTU · maker spec	22–36″	14″
Windmill 8,000 BTU Standard (double-hung) · 8,000 BTU · maker spec	23–37″	14″
Midea MWA08CR71 Standard (double-hung) · 8,000 BTU · maker spec	23–36″	14″
Windmill 10,000 BTU Standard (double-hung) · 10,000 BTU · maker spec	23–37″	14″
Midea MWA10CR71 Standard (double-hung) · 10,000 BTU · maker spec	23–36″	15.5″
Windmill 12,000 BTU (WM12W2WI) Standard (double-hung) · 12,000 BTU · maker spec	23–37″	14″
Midea MWA12CR71 Standard (double-hung) · 12,000 BTU · maker spec	23–36″	15.5″
Frigidaire FFRS0822SE / FFRS0822S1 Slider / casement · 8,000 BTU · maker spec	15.5″	21.5″
Frigidaire FHSC082WB1 Slider / casement · 8,000 BTU · maker spec	15.5″	21.5″
Koldfront (EdgeStar) CAC8000W Slider / casement · 8,000 BTU · maker spec	15.5–16.25″	20.3125″
Perfect Aire 4PASC10000 Slider / casement · 10,000 BTU · maker spec	15.5–16.5″	21.5″
Frigidaire FHSC102WB1 Slider / casement · 10,000 BTU · maker spec	15.5″	21.5″
Soleus Air WS3-06E-201 U-shaped (saddle) · 6,000 BTU · maker spec	24–48″	16″
Midea MAW08V1QWT U-shaped (saddle) · 8,000 BTU · maker spec	22–36″	13.75″
Soleus Air WS3-08E-201 U-shaped (saddle) · 8,000 BTU · maker spec	24–48″	16″
Midea MAW10V1QWT U-shaped (saddle) · 10,000 BTU · maker spec	22–36″	13.75″
Midea MAW12V1QWT U-shaped (saddle) · 12,000 BTU · maker spec	22–36″	13.75″

How to measure

Up-and-down windows: open the lower sash fully. Width = inside the side jambs; height = from the sill to the bottom of the raised sash. U-shaped units sit across the sash, so they also need the sash to close down onto the unit's channel. Check the maker's sash note in the table.

Side-sliding and crank-out (casement) windows: slide or open the window fully. Width = the clear opening; height = the full height of that opening. Slider/casement units are narrow (about 14–16″) and need 20″+ of height. A standard unit laid in a slider will not seal.

Running it on a generator

A Window AC (10,000 BTU) draws about 1,200 running watts and 2,000 W when the compressor starts (sourced chart). To size a generator for it, use the calculator.

Ranges verified 2026-09-23. Air-conditioner makers revise specs between model years; the linked page is the authority.