Installing a window air conditioner in a double-hung window is an easy job that should take less than an hour in most situations. The steps given here are meant to serve as a general guide. Various brands of window air conditioners have differing attachment methods. New window air conditioners are packaged with manufacturer’s instructions for installation—be sure to follow these directions. If you attach a unit improperly, it could fall. Measure the size of the opening to make sure the unit will fit. See Sizing a Room Air Conditioner for information about sizing the unit. The best type of window for receiving a window air conditioner is a double-hung window that can be opened at the bottom. The AC unit will need to be plugged into an electrical outlet that can supply the necessary current without overloading the circuit. 1Completely open the bottom sash of the window, remove the window screen if there is one, and clean the sill and channels with a vacuum.Most AC units have accordion or sliding extensions that slide to completely fill the opening.

Some units have these already attached; with other models, you’ll need to slide them into channels on the side of the air conditioner. It’s best to prepare these before putting the AC unit in the window opening.global ac unitSome AC units simply sit on the windowsill; how to choose a central air conditioner unitothers rest on special brackets that attach to the sill. air handling unit priceIf you unit utilizes mounting brackets, install these brackets according to the manufacturer’s instructions. Be sure to level the unit according to the recommendations (typically with a slight downward slope toward the outdoors to allow for drainage of condensation). Make sure the fasteners are secure. Some units come with two lengths of weatherstripping foam—one goes along the sill beneath the unit, which you can put in place now.

The other will go on top of the unit once it is installed. 4With a helper if necessary, lift the AC unit. Use your legs, not your back muscles! Slide it into the window opening from inside the room, positioning it properly on the sill or support brackets and, if using brackets, lock it into place on the brackets. Be careful with this step—don’t let the unit fall out the window! If your air conditioner has a drainage hose, route this to the outside. 5Lower the window sash so that it fits snugly into the channel on top of the unit. The mounting flange at the top of the unit should be flat against the lower window sash. Slide the accordion extensions to fill the opening and fasten them to the jamb. 6Seal the inner perimeter of the opening with foam weatherstripping (often provided). Caulk around the outer perimeter. 7Plug-in the AC unit and enjoy the cool! If the plug has a reset button, check it by pressing the button to see if it shuts off the power. Find Pre-Screened Local Window Air Conditioning Installation Help

I need to install a window air conditioner in my master bedroom. However, the only suitable window there is a horizontal sliding window. To complicate things more, I need to place it on top, since my king size bed obstructs the lower part, as you can see here: This is how that window looks from the outside: I'm thinking in building a support structure like this one, using 2 by 4 planks: And after some thinking I think I can attach the transversal planks to the vertical ones, instead of attaching them to the outer wall, like this: And now, I'm thinking I can get rid of the exterior support structure altogether (in red in my last two pictures). The AC unit weights 48 lbs.Is there a simpler/better way to do it? Also, I'm renting, so I'd lean towards a solution that does the minimum damage to the window structure. hvac air-conditioning woodworking mounting I did this, almost exactly as you have drawn (in my mothers home when I was a teenager). You will need to support the back end if you cannot support the bottom "lip" of the AC from sliding forward.

In other words, the AC will have torquing-force. The reason I used a shelf for my AC was because I couldn't support the top. But since you are putting the AC at the top of the window, then you need to support the bottom from pushing both down and inward (or set it on a shelf). You will need to build/cut a groove (not just a front lip). A front lip is bad for two reasons: 1. A front-lip-only would mean that you would be able to lift the back of the AC up (when lift it, the bottom lip will slide out of the back of the window). 2. If you plan to unscrew the lip to remove the AC, it may slip forward suddenly (when the last screw comes out). You need to consider taking the AC out of the window (and putting it in). So leave a little slop/space/room in the groove to lean the AC forward and lift it out. Normally it's not a problem, because you can lift most windows... but you will be at the top of the window. If the bottom lip is 1 inch wide, you will probably need to cut the groove 1 1/4" wide.