How Do I Mount an AC in a Horizontally Window?

Question

Most windows have a pane that slides up and down. I have a window that slides from left to right. I cannot seem to find a kit that will allow me to mount my AC in such a window.

does anyone have any suggestion on a method to mount a window AC in a window that slides horizontally, rather than vertically?

With a verticle window, all you need to do is fill up the space on either side of the AC, and the window pane slides down and seals against the AC. with a horizontal window, you need to fill up a ton of space ABOVE the AC, and somehow keep it all sealed and insulated.

Answer 1

Typically, you would need to either purchase a unit made for that type of window, or purchase a portable unit, which will actually sit in the room, and just vent out the window.  The portable unit is actually the better choice if you have the floor space, because it puts so little weight into the window frame (All you have is a panel with the intake/exhaust vents)

Here is a link to just one such product....you can find many more if you do a search for "portable air conditioner"  

http://www.air-conditioner-america.com/d...

They cost just a bit more than most 'window' units, but are more efficient, and usually, higher BTU capacity.

If I absolutely had to use a standard window unit, I would remove the sliding pane, and install a vertical brace, anchoring it to the top/bottom sill plates, then put in a horizontal brace, to hold the window unit.  Fill the gap above and to the sides with a couple of layers of exterior grade plywood, and foam insulation between them.  Paint the plywood inside and out, after priming it.

By the time you do all of this.... it may cost as much as the split AC/portable unit, and still not work as well.

Good Luck

Answer 2

The question of the WEIGHT of the unit is paramount of your problems right now! All depends upon how much you are allowed to modify the window, and in what ways. If there is a landlord, they most definitely will want to be primarily involved in the installation! And they may well have the materials on hand to do the best job of it, per their chosen design of the situation requirements and opportunities for reliable solutions. If it is all your own stuff, then add a strong cross beam on top well-anchored at both ends, to bear the weight of the heavy unit. Alternatively, arrange strong bracing from underneath the back of the unit. Regards, Larry.