Consumer Reports says there are things you can do that can be more effective than an air purifier. First, ban indoor smoking."If you've got a smoker in your family, you should not let them smoke in your house because that's an incredibly large source of pollution in the home," .It seems like everywhere I go, people have an air purifier running. No one wants to breathe dirty air. Just remember a machine alone, won't clean the air or relieve asthma or allergy symptoms.A cold air intake or induction system includes intake piping, the theory being that you should have the filter, which is usually cone-shaped, located somewhere it may draw in cold air, usually in front of the bumper or somewhere close-to air circulation away from engine heat. An aftermarket air filter with no induction piping can be installed to replace your factory air-box which sits inside your engine bay. Or there is the another form, the drop in filter, that is manufactured to out flow your factory filter with out causing any of the side effects generally associated with aftermarket CAI systems and rests inside the air-box, in the spot of the typical paper edition.
Schultzy @ https://www.unitedfilter.com/