In order to get the maximum efficiency from the air purifier, you need to place the equipment where it can maximize the flow of air into the system.
Each manufacturer will recommend the minimum distance around the device in the product manual. Therefore, please read the instructions carefully. For example, one example is 24 inches from any wall or obstacle (such as furniture).
If there are no recommendations in the air purifier instructions, you can place it as close to the center of the room as possible. In this way, it can easily inhale particulate matter from every corner of the room with higher efficiency.
If you can't place the air purifier near the center of the room, try to make it as close as possible, because it is better than putting it in a corner.
Another option is to set the air purifier at the location closest to you. For example, if you often sit in the same position on the sofa in the living room, place the air purifier nearby. In this way, since you are within the nearest range of the air purifier, you can ensure that you breathe the cleanest and freshest air possible.