
Increase BTUs if your ceilings are higher than 8 feet.Increase BTUs by 10% if your room gets a large amount of sunlight and reduce BTUs by 10% if your room gets very little sunlight.Use the chart below to find the ideal cooling capacity for your room size: Through-the-wall ACs use British Thermal Units (BTUs) to measure their cooling capacity: The higher the number of BTUs, the more area the AC can cool. Selecting the Right SizeĪs with all room air conditioners, purchasing a model with the appropriate cooling power is the most important place to start. If you feel like a window AC might be a better fit, take a look at our Window Air Conditioner Buying Guide for more information. However, there are Window ACs that can be installed through a wall, and are designed with slide-out chassis for this purpose. This is due to the difference in venting. It is important to note that Through-the-Wall units and Window units are not necessarily interchangeable-even if they’re the same size. Best for rooms with more than one window or where the view from the window doesn’t matter.Vent through the back and sides of the unit.Have side panels which help secure and block outside air, but are not air-tight.
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Are Through-the-Wall Air Conditioners Quiet?.Installation: Wall & Electrical Requirements.How Do Through-the-Wall Air Conditioners Work?.Whether you're looking for your first through-the-wall AC or are replacing an existing thru-wall unit, we have everything you need to know about buying the right air conditioner for you. For easy access to the topics in our buying guide, click the titles below:
