......wow. Where I live if you have negative pressure in your room it's kind of hard for the smell to get out.......you exhaust through the filter.
Something like this works good if you change out the carbon every 6-12 months(strain dependant).
The air is sucked through the filter and pushed out the exhaust.......that air doesn't smell at all and if you run your intake so it keeps a bit of negative pressure in the room no smell goes in/out of the room when you do.......the air from the exhaust on my ac is hot and does smell a tiny bit, but seeings as I dont have to worry about it, I dont: if I had to I would go bigger on my fan there and y the exhaust into the filter itself.......
And I agree with
snyder that the diy's are good, as good as what you can buy almost, but they are a pain in the ass to make and you still dont want to skimp on the materials you buy----the carbon is very important.
That set-up works the same if you keep the filter outside the room if you turn the fan around and push the air out of the filter; just make sure it's sucking through rigid ducting. <----this idea is
supposed to work and it makes sense that it would, but I cant actually claim I've done it.
Something else to keep in mind is noise.......the exhaust on these things can get loud if noise is of concern, and if smell is an issue then noise may be as well.......the bigger ducting you use the quieter the noise from the air movement out of the exhaust, and there are mufflers(diy here too), and insulated ducting, etc. If you can exit everything to the attic half of the problem is solved right there.
And these ozone generators.......I cant really say anything good/bad about them from my own exp. I just know they've been around awhile and I haven't heard very much about them......so your lucky and no IMO from me
Hey, hopefully, if you do a DIY you will record your findings, pics would be cool too!
Have a great week!!
growinman