Nima, a few things:
1. You started like 4 different threads about carbon scrubbers and exhaust; just a friendly reminder to try to keep similar threads together instead of creating multiple ones; it not only will keep you in better standing of the forum rules but it makes it easier for us to respond conclusively to your questions without having to spread it out over several new threads. :stylez rasta smoke:
2. Based on your other threads you started, you need to get some things hashed out and finalized before going through with this. For starters; you really need to decide what you're growing in. Are you going to actually build a grow box? What dimensions. Are you going to do a PC case micro grow? The other side of this is your planted pot size; what are you planting this in? Remember; plants will grow based on the room they have to root in; so the bigger the pot, the bigger the plant.
3. To back up Mustard, all strains emit an odor. Different phenotypes can show their face even with the same strain; so one "not so stinky" strain might have a same strain sister that reeks like my great uncle Toby. You are taking a serious gamble by not taking preventative measures BEFORE you start growing. It's far easier to be proactive than reactive my friend.
4. You may not necessarily have to exhaust your tent outside; especially if your room temperatures are maintained. I vented a large 4 foot by 4 foot by 7 foot tent into my basement (air pulled through a 6" carbon scrubber) and there was virtually zero smell from the exhaust and an added bonus was the heat help warmed my non-insulated basement! If you are growing a smaller strain and using a scrubber and/or other odor prevention methods; there's a good chance this could still work out for you.
5. I'm an advocate of things like ONA gel, but used primarily in conjunction with carbon scrubbers. Hands down, a carbon scrubber is one of the best and most cost effective options you have for odor control and reduction. ONA is essential oils; which have their own ups and downs. ONA can work VERY well, or it may not do the job (this is based on how essential oils work, not how ONA is manufactured.)
6. How is your room set up? How many outside walls do you have? How many inside/shared walls do you have? Is this an apartment? If so, remember most interior apartment walls have a very low R-value (if there is any insulation at all, especially if it's an older building.) Where does your air intake come from? Is this shared ventilation with others in the building?
7. A friendly reminder; even if you live in a place where growing cannabis is legal, security should be number 1 on your mind. It doesn't sound like you are growing in a legal area based on your posts (and if you are my apologies for being presumptuous.) If that's the case; remember it's not just law enforcement that you need to be concerned about, but others in your area. Cannabis is still a high paying commodity to many and there are people that would love to rip off someone doing all the work and taking the risks and liabilities. This your ship and you are the captain; run a tight ship and you will have smooth sailing.
Here's the Odor guide that IDontSmoke referred to; it's a work in a progress but covers some more of the technical aspects of odor control reduction and methods available. Hopefully it will give you a little insight into your plants and what's available to you!
https://www.autoflower.org/f5/vapors-comprehensive-guide-odor-control-reduction-methods-22799.html
Don't be discouraged by any of this; I just don't want to see something happen because not enough attention to detail was paid. Good karma brother. :karma Cloud: