Hi- I have an Xtool P2 and an Xtool air purifier but we are having issues with pretty intense smoke venting and fairly heavy smoke smells in my classroom. As I've researched on the website, it looks like the current purifier has an exhaust port for smoke that is filtered through the filters which can be vented outside. Our unit does not have the second port for venting.  Would it be wise to vent directly outside using the in-line duct fan?