How many plants do I need to purify the air in my apartment?

I want to get some house plants to make the air in my apartment cleaner and I know what types of house plants to get, I just don't know how many I will need to get for a one-bedroom apartment. For it to make a real difference, is it like 2-3 or like 20-25?

How many plants do I need to purify the air in my apartment?
When you say 'cleaner' do you mean to help convert CO2 to O2 or to help remove dust and allergens from the air? A plant will not help remove allergens from the air... it might even add to it!



Consider how 'clean' it is to have ports of dirt in the house. Moist earth is a breeding ground for microbes, fungus, and even small insects. No matter how clean you are... those buggers somehow find a foothold. Not the best thing if you have health concerns.



If you really want to clean the air, consider an ionic breeze ^_^



If you want plants to add a sense of 'life' to your apartment, consider plants that won't need to sit around in stale water (which will start to smell) or moist earth (breeding ground).



BTW, what plants are you considering?
Reply:Ferns...they may not be that pretty, but they are EASY to take care of. You can hang them also. They are good in a bathroom too.
Reply:i think is if you dont need.
Reply:For aplace that size about 15 well tended larger plants