Written You would need to realize that the space being cooled and the space the A/C unit rejects its heat into must be separated.  How this is done would be upto you.  If you want an extra hot bathroom and cut a hole int he wall and put the "outside" end of the unit in the bathroom then you can heat it up, and cool the space on the other side of the bathroom.  Otherwise you would need to somehow surround the "outside" section of the a/c and transfer its heat rejection and airflow to a place you don't mind, like pipe it outside, or into the attic, or the basement or something.Heat laws are heat laws.  It transfers the same whether in a window shaker, an expensive chiller, or from a stove to a frying pan.  It is not magic and bringing the AC unit indoors will not magically work, there is a reason they are mounted in windows.  They reject heat from indoors to outdoors.  Just like a stove to the pan, and from the pan to your food.  The AC unit is a medium of technology and mechanical components to transfer heat.

Written You may be able to rig up something whether the compressor-side air intake and exhaust are piped outside, but the efficiency will be low and you may risk burning out the compressor by working it too hard.If you want something you can install in a small opening, you might consider wheeled portable AC units which come with a flexible duct.If you're still determined to try it, note that window AC units have two sets of air intake & exhaust:the "inside" side that takes air from inside (usually through a large filter on the front), cools it, and blows it back insidethe "outside" side that takes air from outside, heats it (with the heat removed from the cool side) and blows it out the back.On a typical window AC unit the "outside" air comes in through vents on the side and top of the unit and is blown out the coils at the back. So you will need to make sure both of those parts are getting the airflow they need. And they can't be the same duct, or else you will just get super hot air re-circulating through the unit.

Written As you aware Window unit air conditioners are installed in an open window. A large house or building may have several such units, allowing each room to be cooled separately.Written I'm unsure of the nature of this question but yes you can.  You can for example cut a hole through your bedroom door and install it through the door.  The back would be facing the rest of the house and you would make your bedroom super cold.  window air conditioning units costWhile at the same time dumping the heat into the rest of the house instead of outside.wall air conditioning units pricesWritten it depends very much on the nature of the rooms. wall unit air conditioner discountBut 9 out of 10, the situation wont be a feasible one.

If your inside room has one of its walls adjacent to some crawl room or some unused room which is itself well ventilated then yes you can. But most set ups of inside rooms  they wont permit this. Just as a matter of interest what inside room could that  be? So, here's the dilemma. I want to install a window unit in my garage. I know how to do this, but my wife isn't supportive of the idea because we are trying to sell the house currently. Anyways, rather than fighting this never-ending battle with her, I'm trying to see if I can somehow still use my window unit without actually cutting a hole in the wall, etc. An idea that I had was to figure out somehow how to route the exhaust to outside. This is obviously an issue because I would need an opening somewhere in my garage. Is it possible to use my window A/C unit in my garage without actually installing it in the wall? You may be able to rig up something whether the compressor-side air intake and exhaust are piped outside, but the efficiency will be low and you may risk burning out the compressor by working it too hard.

If you want something you can install in a small opening, you might consider wheeled portable AC units which come with a flexible duct. If you're still determined to try it, note that window AC units have two sets of air intake & exhaust: the "inside" side that takes air from inside (usually through a large filter on the front), cools it, and blows it back inside the "outside" side that takes air from outside, heats it (with the heat removed from the cool side) and blows it out the back. On a typical window AC unit the "outside" air comes in through vents on the side and top of the unit and is blown out the coils at the back. And they can't be the same duct, or else you will just get super hot air recirculating through the unit. You can place the whole unit outside make it water prof. Duct the (inside) which is the inflow side and the cool air to the inside of your garage. If you have an attic access in your garage you should be able to vent it to the attic.

If the AC unit is expendable, try running it face down. If it tolerates that, you could set it in the attic, on boards facing down that hatch (until it falls on a buyer/inspector and gets you sued). If you could rig two ducts through your attic access, but that's going to look much worse.Browse other questions tagged hvac air-conditioning garage or ask your own question. HomeSafety EducationSafety GuidesHomeThe Inside Story A Guide To Indoor Air QualityThe Inside Story: A Guide to Indoor Air Quality The link you selected is for a destination outside of the Federal Government. CPSC does not control this external site or its privacy policy and cannot attest to the accuracy of the information it contains. You may wish to review the privacy policy of the external site as its information collection practices may differ from ours. Linking to this external site does not constitute an endorsement of the site or the information it contains by CPSC or any of its employees. Click Ok if you wish to continue to the website;