Does any1 use an inline carbon filter as a secondary method to remove odour? Or am I best adding another carbon and a fan set to X in my tent?

Air purifiers do not use UV below 254nm. This means that "yes they do create singlet oxygen". But without a UVC below 254nm there is not enough latent energy to create enough singlet oxygen fast enough to form O3 (ozone). This is due to singlet oxygen having a lifespan of picoseconds. Air purifiers are not dangerous like some would have you believe. Some get scared at mention of UVC without really understanding it. So long as it's not lower than 254nm it simply cannot do what people so willingly scream about. The real concern is raising O2 levels above 23% ambient, which is why we keep airflow. Whatever CFM you calculated for your tent you will need to almost double it when you add a carbin filter and add 50cfm for every 6ft of duct, also a little extra for any bends.

Si tu veux que rien ne s'échappe de ta tente il faut qu'elle soit en dépression. Avec les filtres à charbon pour contenir l'odeur au maximum. Puis Plein de plantes verte odorantes pour masquer les restes.

Hey Shazzabee! I totally get the concern—keeping that scent under wraps is priority number one. You’re right to be cautious about ozone generators; they can be tricky and potentially harsh if they leak into your living area. To answer your question about the "sum," the industry standard is to ensure your fan and filter can exchange the entire volume of your tent air at least once every minute. You calculate your tent's volume in cubic meters (Length x Width x Height) and then look for a carbon filter and fan combo with a CFM rating that exceeds that number by about 20-30% to account for the resistance from the ducting and the filter itself. If you're already hitting those numbers and still smelling something, adding a second smaller carbon filter and fan kit inside the tent to scrub the air internally (a "scrubber" setup) is often much more effective and safer than messing with ozone. Happy Growing Growmie🌱

you should not use ozone outside of a proper use case keep your environment dialed in and smell will be minimal. growing outside gets smelly but indoors with a proper lung room and temp and humidity, filters don't really become any value added until post harvest.

I would imagine a lot on here use carbon filters. Make sure you filter is rated for your extraction fan, eg if your fan does 300m3/hr your filter needs to be higher otherwise your pulling air through it quicker then it can scrub smells. Mine has started to leak smells but it's on its 4th grow and been running for 18months and the strain im growing is incredibly smelly, I should have replaced it before starting my grow.