The goal of a condensing unit is to keep noise levels low enough that it will not be noticeable, but high enough that the occupants feel comfortable with their surroundings. Most units come in units that fit a standard door, and units that fit vents in the wall or ceiling of the room. Each type has its own benefits and downsides, so it’s important to be sure you get the right one for your home.
The most common type of unit is the one that sits on the floor in front of the fan and fanboard. The door simply slides in and out, and when the fan runs the fan pushes air out into the room. In many cases this does a good job, but in some situations it’s noisy and creates a certain level of discomfort in the room. As a result, many people install a second unit that sits on the floor. This unit is designed to be much quieter than the first one, and it works well for many rooms.
The final type of unit is what is sometimes called a “mid-frequency.” This type of unit sits on top of the floor and is mounted near the fan. It has a motor attached to the fan and is designed to be louder than the other type. This is the type you’ll find in some homes, and it’s often the best choice for quiet rooms like the bathroom, kitchen, or the living room.