Not all air filters are created equally. How will you suppose what air filter is great for you? It just depends on what your needs are. There are multiple types of air filters & media air cleaners so you can use them for your apartment or business if that is what you need. For example, if you need a filter that is going to filter out almost everything, when I was just looking no further than I HEPA a filter. HEPA filters are great if you need a sterile & clean environment, or if you are just looking to have a actually clean home. Another pick for a filter is a UV light filter. A UV light filter works by killing any kind of germs or bacteria that would get into your apartment on contact. The only downside is that you have to change the light bulb, & you have to check periodically to make sure that the bulb has not burned out. Other than that though it’s self-explanatory to connect to your HVAC system, & can be used immediately. If you do not need to completely disconnect everything from your apartment & are looking for something a little more easy then the two of us would recommend media air cleaners. Standing media air cleaners are a great addition to any apartment & will actually disconnect any germs from the house. If a kneeling media air cleaner or media air cleaner isn’tenough, then the two of us would suggest a whole apartment media air cleaner. They can be pricey but they’ll guarantee they get the task done. To research all your peculiar possibilities & find what kind of air purification or air filtration pick will work for you.