Is intake and exhaust required with envirolites(200w)?

[Lowryder1]

Thanks.

I found air purifier like this:
Philips Clean air system HR 4320B (as new) - eBay, Air Conditioners, Cooling, Major Appliances, Home. (end time 09-Oct-07 16:35:36 AEST)

You think it will take care of the smell? That combined with intake and exhaust...