Gee88 Posted September 6, 2020 Share Posted September 6, 2020 Hi , I having high humidity problems in my 2x4 tent During flowering . I have my extraction fan on 24hours but it doesn’t seem to help. During lights off humidity is over 70%. I have defoliated a bit but it never really made much of a difference. Is a dehumidifier my only option and what one can I use in such a small tent? Thanks for any advice. Quote Link to comment Share on other sites More sharing options...
SkunkPharm Posted September 7, 2020 Share Posted September 7, 2020 Where do you live? What is your relative humidity outside of your tent? Quote Link to comment Share on other sites More sharing options...
PsyCLown Posted September 7, 2020 Share Posted September 7, 2020 As @SkunkPharm mentioned, we'd need more info. If the RH in the room is high, then you can add as much extraction as you want, the RH will not drop as the air being sucked in still has the same RH. In such a case, you'd need to look at a dehumidifier. Quote Link to comment Share on other sites More sharing options...
Gee88 Posted September 7, 2020 Author Share Posted September 7, 2020 Thanks for the replies. I stay in jnb. The room humidity is 56% and the tent humidity at the same time is currently 69% during lights off. Quote Link to comment Share on other sites More sharing options...
Bakstein420 Posted September 7, 2020 Share Posted September 7, 2020 (edited) 12 minutes ago, Gee88 said: Thanks for the replies. I stay in jnb. The room humidity is 56% and the tent humidity at the same time is currently 69% during lights off. What cfm does your fan push? How many ladies have you got in that tent? Edited September 7, 2020 by Bakstein420 Quote Link to comment Share on other sites More sharing options...
Gee88 Posted September 7, 2020 Author Share Posted September 7, 2020 24 minutes ago, Bakstein420 said: What cfm does your fan push? How many ladies have you got in that tent? It does 328m3/h. I have 8 plants in a sog , each in a 10l pot taking up 30x30cm space each. Quote Link to comment Share on other sites More sharing options...
Bakstein420 Posted September 7, 2020 Share Posted September 7, 2020 Are you measuring humidity above or below your canopy? Quote Link to comment Share on other sites More sharing options...
Gee88 Posted September 7, 2020 Author Share Posted September 7, 2020 1 hour ago, Bakstein420 said: Are you measuring humidity above or below your canopy? A few centimeters above the canopy.almost touching the highest growth. I move it up as they grow . Quote Link to comment Share on other sites More sharing options...
Live Canna Posted September 8, 2020 Share Posted September 8, 2020 Might be best to pull some fresh air from outside then if the room has such a high humidity? What is your set-up? 1 Quote Link to comment Share on other sites More sharing options...
Prom Posted September 8, 2020 Share Posted September 8, 2020 If you run into issues on dark times, you do not vent enough your tent.. and the temp drop releases moisture. Your tent gets the climat from your room... handle your room so your tent is fine. Look that the air inside the tent is exchanged 5 to 6 times a minute.. still needs fans inside the tent to blow the plants directly. You can easy place the dehumidifier in your room, will reduce humidity inside your tent.. but i think you just need more venting of your tent. Quote Link to comment Share on other sites More sharing options...
PsyCLown Posted September 8, 2020 Share Posted September 8, 2020 Do you have a carbon filter as this does effect the extraction, especially when humidity is involved. If there is limited passive air intake, that too can make a huge difference! Quote Link to comment Share on other sites More sharing options...
Gee88 Posted September 10, 2020 Author Share Posted September 10, 2020 Thanks, I think the room humidity is just too high and I need to drop that . Quote Link to comment Share on other sites More sharing options...
PsyCLown Posted September 11, 2020 Share Posted September 11, 2020 10 hours ago, Gee88 said: Thanks, I think the room humidity is just too high and I need to drop that . Well, it's not terribly high per say. Check the humidity outside and compare to what it is inside the room and then you'll have an idea as to whether the room is keeping humidity in or whether its more or less the same as the outside ambient humidity. The difference in humidity between your room and inside the tent is more of the problem I reckon. I doubt the room is that far off from outside, unless there is no ventilation inside the room, but chances are it would then increase quite a bit too after a few days. Quote Link to comment Share on other sites More sharing options...
Gee88 Posted September 11, 2020 Author Share Posted September 11, 2020 I’ve put the sonoff sensor outside the tent and it records the room humidity at 60%. Outside humidity is 17%. I borrowed a dehumidifier to see if that would solve the problem before I spent the money and it doesn’t even come on. Says the humidity is 43%. Now I need to get a different humidity sensor to see if the sonoff or dehumidifier is wrong. Quote Link to comment Share on other sites More sharing options...
Ill_Evan Posted September 11, 2020 Share Posted September 11, 2020 20 minutes ago, Gee88 said: I’ve put the sonoff sensor outside the tent and it records the room humidity at 60%. Outside humidity is 17%. I borrowed a dehumidifier to see if that would solve the problem before I spent the money and it doesn’t even come on. Says the humidity is 43%. Now I need to get a different humidity sensor to see if the sonoff or dehumidifier is wrong. My bet would be the dehumidifier. Those devices including humidifiers have terrible sensors. I would set them and cross reference using another humidity sensor like the Sonoff and just adjust the de/humidifier until I got the humidity I wanted. 1 Quote Link to comment Share on other sites More sharing options...
CreX Posted September 11, 2020 Share Posted September 11, 2020 what is raising the humidity in the room? i know my tent room hovers below 60% if my window is open a certain gap. the more open the window, the lower the RH could you possibly keep a window open in the room? or more open if you have one open? Quote Link to comment Share on other sites More sharing options...
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