@Luandri you need to be careful how concentrated the plume of smoke entering the fan is.
Here’s a pic from another member that tried this in the past, this was working well at first:
Here’s the result some weeks later: Dead Grobo - Grobo Support - AllGrowers Forum | Hydroponics, Harvesting, Cannabis, and more
My humidity hovers between 20-30% most of the time, it hovers around 40-50% when there are a lot of leaves/buds growing. I try to raise it to about 40% or more when possible but that’s not always possible. I’ve perhaps observed a slightly lower yield due to that.
If the roots are not healthy then more humidity helps but I’ve found that maintaining the perfect amount of humidity is nice-to-have rather than need-to-have. The roots are always in water, so (my understanding is that) as long as the roots are functioning that should make up for most of the difference.
Here’s where I position my humidifier and try to leave it on the lowest setting as not to refill it too often, it raises humidity from a starting point of 15-20% to about 30-40% usually.
I point the nozzle of the humidifier toward the wall instead of toward the grobo. There is AC and fans behind where the pic is taken to push cold air into that corner behind the grobos; that helps break up the mist a bit too and the lower temps make it easier to maintain the RH % btw.
Placing a container with some water inside the grobo might help raise humidity but I’d still be cautious not to overdo it. The biggest thing that helped me to raise my humidity was keeping door and windows to the room closed and the temperatures down to a “comfortable cool”.