They are much easier to install and use. Given that they are free standing, these is no need to wrestle them into windows. Moreover, they can be quite effective in clearing out smokey rooms and bringing hot windows to a comfortable temperature. Because they have just one tube that goes through the window, these options are also much more aesthetically pleasing than traditional units.
They also supplement existing units in a number of ways when these are not sufficiently cooling down spaces. Sometimes central AC is not adequate and adding a freestanding unit can make a ton of difference. This is certainly the case for rooms that receive a lot of natural light.
This is a problem that you can resolve by sitting a windowless air conditioner model right in the center of a room that is overheated. This will circulate cooled air and slowly drop the indoor temperatures in this space.
Our favorite free standing ac with heat is the Whynter 14,000 BTU Dual Hose Portable Air Conditioner with Heater (ARC-14SH). In fact, we have one of these in our office.
People can even use these models to reduce unpleasant odors in the home, such as mold, pet odors and even boisterous kids. Given that they pull air from outdoors, they are always providing a consistent flow of fresh air into the abode, thereby driving foul odors out. They are also able to contain odors that exist in a location before these are eliminated. They contain cigarette smoke far more efficiently than will a central AC system as the smoke will not be circulated throughout the home.
There are, however, a few drawbacks to owning a windowless AC. Even though they will cool down a space quite well, it can take a bit of time for these units to get the job done and in some instances this could wind up taking twice the time that a window-mounted unit will take.
In climates that are extremely hot, these might not be very effective. Thus, if you live in an area that is particularly hot, it is probably best to consider other options. If you don’t, just be mindful that it can take a long time to obtain comfortable indoor temperatures on sweltering days. If you have central AC already, however, this is not likely a problem that you will deal with.
Cost is another issue. Windowless models are not the most efficient. Because they draw hot air in, this makes them less efficient. The result can be higher energy bills.
The last potential drawback of these models is that they work well in a single room only. They are not designed to push cool air into other spaces. This is not something to use for major heat waves, but if you want to cool down one room only and would like a visually pleasing design, these are good options to invest in. I have a windowless model of my own and I love how it works in keeping my office cool and comfortable.