There isn't a great amount of literature on this subject it seems. I have an air conditioner, the manual assumes that you have a vertical sliding window, but I have one that slides horizontal, so how do I install the unit? Most window units are designed for double hung windows. If you want to place it in a casement window (or a sliding window) you really should use a unit designed specifically for that. However, anything can be hacked. If you build a proper bracket/shelf, and then enclose the top part (plexiglass, for instance) you can probably use what you have (provided it fits, of course). Most of the ones I've seen are install like this with a timber frame made to sit into the window frame then put the air-conditioner inside of the frame and box it out with plywood, but this looks like a much neater installation where the frame is made from c channel with a perspex panel above the airconditioner. It would probably depended on how long you intend to have the air-conditioner install in the window, as to which option you would go with.

Rolling portable units solve all such problems, The only thing that needs fit in the window, sash or slider, is the adapter for the flex duct (similar to a dryer duct) that takes the place of the AC's sitting inside the window or wall. Such units also have the advantage of portability: set them up quickly where ever needed or using whichever window is most convenient. As for casements--assuming that were all you had, the non-crank pane would need to be removed and modified to receive the duct adapter. The inside portable units also offer the advantage of easy cleaning and servicing; and an greater efficiency viz-a-viz a window/wall unit exposed to direct sun and hot outdoor temperatures; and cooling capacity which is not governed by window opening size. They are also much easier to find than vertical window units.Browse other questions tagged air-conditioning or ask your own question. Many people have inexpensive air conditioners that are intended to fit into a double-hung (vertically sliding sash) windows and want to use them in horizontally sliding windows.

If you already have some of these air conditioners or are attracted to them because their price tags are significantly lower than that of casement units, portable units, or central air, it is possible to make a frame to adapt them to sliding windows. These solid, simple frames require no exterior brace.  This is perfect for apartment dwellers and those who only need an air conditioner a few months of the year.  It takes about an hour and some basic lumber and tools to construct these frames.  Once built, your air conditioner can be installed and uninstalled in minutes.  (Please note that window air conditioning units aren't intended to be permanently installed.  These frames also make it simpler to remove them at the end of the warm season.) The units pictured include unfinished plywood.  However, this can be finished, painted or replaced with plexiglass or other materials, as the sheet lumber simply covers an opening and is not structural. 2X4s *(2 or less but the amount varies)

12 deck screws (or other long wood screws)danby portable ac unit These window sills in the picture are fairly deep, allowing for the use of 2X4s. jeep cherokee ac pump air compressorYou may be able to substitute other lumber for shallower sills.pace custom air handling unitsStep 1: Take MeasurementsShow All Items« PreviousNext »View All Steps Download Cools up to 150 sq. ft. Say you need just a little extra cooling, but you want a window unit that really works. Maybe one with 5,000 BTUs, dual cooling speeds and a 2-way air direction function that cools up to 150 sq. ft. Well, we've got it right here. Not a ton of bells and whistles. Just a really great air conditioner. LG window air conditioners come with multiple innovative features aimed at making your life cooler.

Help keep your room cool with the LG Electronics 5,000 BTU Window Air Conditioner (LW5016). The air conditioner can cool a room of up to 150 sq. ft. and features adjustable temperature settings for a customized cool. The air conditioners 2-way air deflect. To purchase this item in your local store, search item No. 206520593 Estimated cooling area (150 sq. ft.) for temperature control 2-speeds: 2 cooling and fan speeds with auto cool keep your cool under control three powerful cooling and fan speeds allow you to control the temperature of your room at your pace 2-way air deflection helps spread the cool air throughout the room Washable filter helps save money on replacements Combined Energy efficiency rating of 11.0 UL listed for safety Designed for installation in a window that measures 21 - 35 in. W and at least 12 in. Automatically restarts after a power failure there are storms, high winds and extreme heat that can lead to power outages keep yourself covered with AutoRestart, which automatically turns the unit back on when power is restored

Removes up to 1.5 pt. of moisture from the air in a hour to control humidity Product (W x H x D): 17.31 in. x 11.13 in. x 14.38 in. This question is from 5,000 BTU 115-Volt Window Air Conditioner4 Powercord Hi, I just installed this unit in my bedroom,The manual doesn't recommend using a power cord extension, but the cord is too short for my roomIs it too dangerous to use with a power cord extension?? I ran it for 3 hours yesterday and it wasn't a problem This question is from 5,000 BTU 115-Volt Window Air Conditioner4 Can this unit remain in the window in the rain? The LG 5016 window air conditioner has large vents in the top and sides of the unit. Will I have to remove the unit in rainy weather or can it remain in the window indefinitely?My mother has a large window AC and hers came with a "sleeve" which prevents water from entering the unit directly from the top so her unit can remain in the window indefinitely. This question is from 5,000 BTU 115-Volt Window Air Conditioner4 Can I turn vertical to fit narrow opening?