


Send an email to or talk to us on Twitter and Facebook. The Wirecutter’s editors answer reader questions all the time (much more than once a week). This might be a little frustrating to set up compared with the other options, but it’ll work totally fine once it’s in. Or, you could try installing the AC with one curtain, mostly collapsed, though that might still be too wide.īacking up a step, you could also go with your original plan, and install the unit in your larger window, with both curtains fully extended, and use a piece of foam board to cover the leftover space.

The AC should come with a couple feet of it already, to cover the cracks between the AC unit and the window, but you can buy an extra roll if you need more. Obviously you need to cover the gap so the room stays insulated, but you have a few options. That’ll leave a 1-inch gap on the other side. My advice would be to install the AC with one side against the window frame. The actual width of the LG LW1016ER (the 10,000 Btu version of our top pick) is a shade under 24 inches, which is narrow enough to fit in your small windows. They are not required for a safe installation. However, the AC can be completely secure in your window without both (or either!) of those curtains. I think (but am not sure) that it’s mandatory for manufacturers to report the width that way, because federal efficiency standards require those curtains to come with every AC unit.

The window AC width “requirements” always assume that you’ll have both side curtains installed. A: Good news: You don't have to resort to a bulky and inefficient portable air conditioner.
