Will a portable AC's window kit fit my window?
Every portable air conditioner ships with a window kit: a set of sliding panels that fills the gap around the exhaust hose. It fits when the length of your open window falls inside the kit's minimum–maximum range. On an up-and-down window that length is the width of the opening; on a sliding window it is the height. Crank-out (casement) windows need a special kit on almost every model.
Pick your window type and enter the length to see the units whose included kit fits.
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Every unit we list, with its maker's kit range
| Unit | Kit length | Up-down / slide / casement |
|---|---|---|
| Black+Decker BPACT08WT 8,000 BTU (4,000 DOE) · maker spec | 26.5–48.4″ | yes / yes / not stated |
| Dreo AC318S 8,000 BTU (5,000 DOE) · maker spec | 18–53″ | not stated / not stated / not stated |
| Hisense AP0822CW1W (8,000 DOE) · maker spec | 18–50″ | yes / yes / not stated |
| Honeywell HJ5CESWK0 15,000 BTU (10,800 DOE) · maker spec | 19.7–38.2″ | yes / yes / not stated |
| LG LP0821GSSM 13,000 BTU (8,000 DOE) · maker spec | 18–50″ | yes / yes / not stated |
| LG LP1021BSSM 14,000 BTU (10,000 DOE) · maker spec | 18–50″ | yes / yes / not stated |
| LG LP1419IVSM 14,000 BTU (10,000 DOE) · maker spec | 23–60″ | yes / yes / not stated |
| Midea MAP12S1TBL 12,000 BTU (10,000 DOE) · maker spec | 19.1–63.8″ | yes / yes / not stated |
| Toshiba RAC-PD0812CRRC 8,000 BTU (6,000 DOE) · maker spec | 19.4–62.2″ | not stated / not stated / not stated |
| Whynter ARC-122DS 12,000 BTU (7,000 DOE) · maker spec | 20–46″ | yes / yes / not stated |
| Whynter ARC-14S 14,000 BTU (9,500 DOE) · maker spec | 20–46″ | yes / yes / not stated |
Before you buy
Measure with the window fully open, inside the frame. If your window is longer than the kit, an extension panel from the same maker usually closes the gap; if it is shorter, the kit can often be cut. Check the manual for your exact model: the linked page is the authority. Crank-out windows open outward and leave a tall, narrow slot, so most units need a casement kit or a custom insert.
Running it on a generator
Air conditioners draw a big starting surge when the compressor kicks in. Size a generator for one with the calculator or the sourced wattage chart.
Kit ranges verified 2026-09-24.