How will I know that the air purifier is actually cleaning effectively? Will the air smell different?
You will know that the unit is cleaning effectively when you check the filters and see how much dust and other particles has accumulated after only a day. Since air purifiers do not produce scented air, you will likely notice that certain smells such as mold or dirt are less noticable in the air. You’ll likely notice the smell in the air if you stop using the air purifier, rather than when you first use it.
If you do begin to notice a smell, it could be that the machine is malfunctioning or overheating. It might also mean you need to clean the machine, since it is collecting the particles from the air and collecting them in one central location.