you should really invest in a Carbon scrubber.....PHRESH is a company that makes reallly good product and have all sizes depending on the size of your room and you will also need a inline fan and depending how big the size of you room and scrubber will need that size fan and the fan will have a CFM's (cubic feet per minute). Good luck and know that it will be a very good thing to get because it also helps push alll the stagnant air out