Window AC / June 28, 2018 / Babette Arsenault.
If the room is shaded then you can decrease the BTU rating you calculated with the climate control unit calculator by 10 percent however if you wish to cool a kitchen youll need to raise the rating by 4000 BTUs. When the room you are cooling is used by two or more people add six hundred BTUs per person to the rating necessary to cool the room. Before you buy the first air conditioner that fits the BTU rating necessary to cool your room make sure you have a window that will be suitable for the unit. Measure windows in the room (make sure not to block fire escapes) and make sure to buy a window air conditioner that will fit into the opening.
I have seen many units that are not even screwed fast. If the window air conditioner is just there balancing in the window frame it becomes very inviting for a unexpected guest. The window air conditioner is also very inefficient. These units use more power per BTU of cooling than any other type of air conditioner. If you are a light sleeper than chances are you will not want one of these window shakers. Window air conditioners are one of the loudest forms of air conditioning. The blower for these units is very loud when running. Then add the noise of the compressor and you have enough decibels to keep many people wide awake all night long.
The answer is It depends on the wall thickness. Sleeve specifications for some window air conditioner manufacturers include the maximum wall thickness before it will cover part of the louvers. For example Amanas 18000 BTU models have a max of 8.5 inches. If the wall thickness is at or below that these models can be used in as a wall air conditioner without adversely affecting function. So whats the problem if the wall covers a little of the louvers? Two things: 1) restriction of air movement and therefore reduced efficiency and 2) these units pull air in very powerfully. Cut wall edges could become loose allowing material to be sucked into the unit and potentially causing damage.
If you choose to use a window air conditioner than you should also look for a place that it can be secured and placed in a room that you will not be sleeping in. As you can tell by now I am not a big fan of window air conditioners. They do have a place for some people. However you do need to be aware of the problems that you may encounter with them. The low initial cost can be offset by the fact that they typically do not last as long as a central air conditioner. Central air conditioning will last much longer be quieter during operation be more efficient be more secure but the initial cost will be higher.