Adding humidity in actively exhausted vert room

[real ting]

Here's the setup:

3.6K in bare bulb vert lighting, 2k is flipped so 6 light locations, 5 are 1k in X, the corners get flipped every 6 hours. Fan under each light blowing up.

Actively exhausted w/ 10" can max fan, probably around 1 air exchang per minute.

6 plant locations.

Temps: ~85
RH : ~22


I'd like to be able to get that up to at least 40, 60 would be great, but is it possible with so much exhaust?

The option I was looking at was the hydrofogger, or even the nutramist, I just am not sure if it'll be worth setting up RO water, the unit, and everything, and then have it not raise the RH by very much at all. Anyone have any thoughts or ideas?

 

[amannamedtruth]

seems like it would be a waste in a ventilated room....22% aint bad, you may just need to water more, slightly lower nute dose

 

[adz007]

I think are called evaporator fans or water cooled fans or something like that. But they basically a fan that you fill with water.

 

[moses wellfleet]

I think you are right it's gonna be impossible to increase humidity cos you are constantly sucking it out your room. I had this problem years ago, RH was 18% at its worst, managed to raise it to 25% by using massive evap coolers that I built myself with cell pads!

Even if you do manage to get up to numbers you are talking about, your water usage, is gonna be a killer.

The whole experience persuaded me to go for the sealed option. Now I have perfect environment 24/7.

Sorry not what you want to hear I know!

 

[desert fox]

It a blessing no bud rot EVER.

 

[BasementBreeder]

I had this same issue for over a year. The naturally low humidity of my environment coupled with the high rate of air exchange kept me at around 40%.

Just like moses, I ended up going sealed.

 

[DHF]

Unless Yas have a lung room to exhaust into and suck from for perfect environment into the grow areas , the raised humidity will always be fighting the air circulation and exchange.......IOW......

Air exchange twice per minute works with the humidity raised by foggers/humidifiers constantly "in" the lung room so the grow areas are dialed for max returns and bottom line yields..without a lung room , you`re pretty much left to seal the grow areas and use CO2 supplements with higher ambient temps ....

70% RH till end of stretch, and as close to 50% till end of cycle WITH air exchange twice per minute once full swellage begins is the recipe for success....guaranteed......

Low RH is the absolute worst enemy of growin dope except in late flower to help prevent airborn pathogens from proliferating....Do a search on "VPD/VAPOR PRESSURE DEFICIT"...anyways...

Holler if I can help Bro.....

Peace.....DHF.........

 

[real ting]

Unless Yas have a lung room to exhaust into and suck from for perfect environment into the grow areas , the raised humidity will always be fighting the air circulation and exchange.......IOW......

Air exchange twice per minute works with the humidity raised by foggers/humidifiers constantly "in" the lung room so the grow areas are dialed for max returns and bottom line yields..without a lung room , you`re pretty much left to seal the grow areas and use CO2 supplements with higher ambient temps ....

70% RH till end of stretch, and as close to 50% till end of cycle WITH air exchange twice per minute once full swellage begins is the recipe for success....guaranteed......

Low RH is the absolute worst enemy of growin dope except in late flower to help prevent airborn pathogens from proliferating....Do a search on "VPD/VAPOR PRESSURE DEFICIT"...anyways...

Holler if I can help Bro.....


Peace.....DHF.........

My prep space is sort of a lung room for intake purposes, but the exhaust goes straight outside. I think the RH will probably raise up a bit one the plants are bigger and transpiring, but not enough to get an ideal VPD number.

I guess I'm not fully understanding the lung room concept, do you mean exhausting and intaking into the same space? Is there fresh air being intaked anywhere in the system then or does it just recirculate the same air? I imagine you'd have to AC the lung room.

What about nutramist fogger set up with lines going to each plant site, so that the humidity is raised locally at each plant instead of trying to raise the whole room? Probably would still dissipate fairly quickly though.

 

[DHF]

My prep space is sort of a lung room for intake purposes, but the exhaust goes straight outside. I think the RH will probably raise up a bit one the plants are bigger and transpiring, but not enough to get an ideal VPD number.

I guess I'm not fully understanding the lung room concept, do you mean exhausting and intaking into the same space? Is there fresh air being intaked anywhere in the system then or does it just recirculate the same air? I imagine you'd have to AC the lung room.

What about nutramist fogger set up with lines going to each plant site, so that the humidity is raised locally at each plant instead of trying to raise the whole room? Probably would still dissipate fairly quickly though.

So much solid info`s been lost over the yrs from all the dead and gone sites Bro......

A lung room is complete with fresh air intake and exhaust outside all the grow areas while "perfect" environmentally controlled air is pumped in and sucked out of the grow areas to be re-mixed and re-used constantly FTW.......also......

Lung rooms need to be at least the same size of the cu. ftg of the grow areas to adequately provide said perfect environment....

I ran my flip rooms with 1 ton 12000 btu portable dual hose a/c`s and 65 pint dehuey`s "thru-wall" and sealed on thermostats and humidistats for insurance in deep summer if the lung rooms couldn`t keep up with excess heat OR transpiration/increased humidity.....but....

My lung rooms had 2 ton/24000 btu wall banger a/c`s thermostatically controlled , and bigass exhaust/scrubber combo`s that came on as needed on timers to exhaust stale stagnant air out of all grow/lung areas .....

As said above.....Lung rooms aren`t for everyone , and all setups have their place , including sealed rooms with elevated temps and CO2 supplements , but......

I rarely see ANYONE running elevated temps in the high 80`s-low 90`s to actually "speed up" the plants metabolism and transpiration rates to actually benefit from CO2 , compared to lung rooms with air exchange twice per minute using "atmospheric" CO2 inherent in the air we breathe that served me well for many many yrs......and.....

There are MANY ways to seal up lungrooms where airborn pathogens or ANY type of critter can`t proliferate in the grow areas guaranteed.......

Good luck and holler if I can help Bro......and....Go look at Gettogro`s "veg room" fogger DIY setup to see about the ultrasonic fogger discs and doin it cheaper...anyways.......

Peace.....DHF.............