Dehumidifer placement for 4x8 tent. Cant drop RH

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Newty

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If your humidity is lower in the room your tent is in, opening all the mesh vents would probably help and even the extra duct holes.

Do you have your intake on the opposite bottom side of tent that the exhaust is on? The exhaust is at the top of the tent right?
 
Siz

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If your humidity is lower in the room your tent is in, opening all the mesh vents would probably help and even the extra duct holes.

Do you have your intake on the opposite bottom side of tent that the exhaust is on? The exhaust is at the top of the tent right?
Yes correct. I also run similar settings but I have my max’s set to 6 for exhaust and 8 for intake or else its a lot of pressure on the tent walls. I try to avoid opening the mesh panels to filter the incoming air.

I think its totally my fault for overgrowing my plants. I raised the sensor above the canopy and its quite a bit lower. Im hoping to get as little stretch as possible and make it to day 21 so I can strip them a good bit.

I waited a week or so too long before flipping
 
Mikedin

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Yes correct. I also run similar settings but I have my max’s set to 6 for exhaust and 8 for intake or else its a lot of pressure on the tent walls. I try to avoid opening the mesh panels to filter the incoming air.

I think its totally my fault for overgrowing my plants. I raised the sensor above the canopy and its quite a bit lower. Im hoping to get as little stretch as possible and make it to day 21 so I can strip them a good bit.

I waited a week or so too long before flipping
How’s the air circulation in the tent? Do you have fans below the canopy as well as above?

Sorry jumping in late diddnt read every post
 
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How’s the air circulation in the tent? Do you have fans below the canopy as well as above?

Sorry jumping in late diddnt read every post

Got 2 9” fans blowing up top just under the lights
3, 6” fans blowing above canopy
2 6” fans through canopy
A large 20” fan blowing under canopy and around pots
And a small 4” inline fan on the floor as a scrubber.
 
Mikedin

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Got 2 9” fans blowing up top just under the lights
3, 6” fans blowing above canopy
2 6” fans through canopy
A large 20” fan blowing under canopy and around pots
And a small 4” inline fan on the floor as a scrubber.
Hmm, fully scrogged through the 4x8?

Can you get some fairly wide pics showing the whole tent? Probe placement etc etc?

I know you said you tried it outside the tent with no luck, how big is the lung room that the tent is in? I run a 50pt in my 20x12 lung room with no problem getting the room down to 45%

What are you trying to maintain inside the tent for RH /Temp

And what is the lung room temp / RH as well with no dehu running?

I keep my probe roughly canopy level but with no foliage within 8-10” of it, I also put a little hood over my probe with a. Piece of paper I noticed my probes always read slightly higher temps than the thermometers / hydrometers I have around the tent

The piece of paper shields the probe from direct light beaming on the probe increasing its temp reading especially of your lights are 18-20” from the canopy
 
cannafarmer420

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I use a basement dehumidifier for my lung room in the summer. It pulls 1 to 2 gallons a day out of the air but the ac struggles sometimes with the heat it puts out.
 
Mikedin

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I use a basement dehumidifier for my lung room in the summer. It pulls 1 to 2 gallons a day out of the air but the ac struggles sometimes with the heat it puts out.
That’s why I try to stagger my grows better now, I try my best to avoid flower mid summer so I don’t have to run the dehu and AC plus the increase in power usage 🤯

the joys of winter grows in basements low temps and low rh lol
 
cannafarmer420

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That’s why I try to stagger my grows better now, I try my best to avoid flower mid summer so I don’t have to run the dehu and AC plus the increase in power usage 🤯

the joys of winter grows in basements low temps and low rh lol
Nice, I have wifi everything so i can balance it out but winter flower is soooo much easier for sure. Once I get a good outdoor grow in I'll be good, 2 plants keeps my stash low though so I have to push through
 
Siz

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Could it be my A/C is a bit overpowered? Im using a 1 ton unit and its pretty cold out rn so my unit is not working as much thus leaving a lot of load on the dehu?

I keep a burner on very low to supplement co2 it adds very little heat
 
Grower1974

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Could it be my A/C is a bit overpowered? Im using a 1 ton unit and its pretty cold out rn so my unit is not working as much thus leaving a lot of load on the dehu?

I keep a burner on very low to supplement co2 it adds very little heat
A 50 pint dehumidifer should suck your room and tent dry if you need it to. I’ve got 1500W of lighting going, 14 plants, a 4X4 tent and 1 30 pint Frigidaire dehumidifer in the room. It keeps up with zero issue.

Do you have a big water leak somewhere or is there super humid air getting into your grow area???
 
Siz

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^ i keep this probe inside the canopy to know the climate in there


And keep my pulse pro just above. There is quite a difference but I was told to track inside canopy numbers.

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Siz

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A 50 pint dehumidifer should suck your room and tent dry if you need it to. I’ve got 1500W of lighting going, 14 plants, a 4X4 tent and 1 30 pint Frigidaire dehumidifer in the room. It keeps up with zero issue.

Do you have a big water leak somewhere or is there super humid air getting into your grow area???

No I dont :/ if anything dry air should be coming in because its dry out and the room isnt sealed really well plus I go in and out the room opening door to outside.
 
Grower1974

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No I dont :/ if anything dry air should be coming in because its dry out and the room isnt sealed really well plus I go in and out the room opening door to outside.
How fast is the reservoir filling up? is it a cheap Amazon Chinese unit?
 
Newty

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Are you growing in medium like soil or hydro?

Do you have another hygrometer you can check your probe against to make sure it's reading the correct humidity?
 
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Are you growing in medium like soil or hydro?

Do you have another hygrometer you can check your probe against to make sure it's reading the correct humidity?

Im in coco and yes i have 6 probes ive placed in different areas. My humidity is high in the canopy im pretty sure its from over growth. Im just waiting to see what I get to end of week 3
 
Siz

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So my probe is placed 6” or so inside the canpoy and thats the one that reads high. My pulse meter will read 5-10% lower than canopy and I have a couple hygrometers near the pots and above near fans and those read around 10-15% less than canopy.


Guessing this is normal for how dense the canopy is? I outgrew it a bit :/

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Newty

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Where did you get that tray in the bottom of your tent?

Outgrown or not, they look beautiful! Wish I had the light power it looks like you have!

Sorry I haven't been able to really help with your issue. It's always nice chatting though, your comments and pictures gave me information and insights that will be helpful!
 
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Where did you get that tray in the bottom of your tent?

Outgrown or not, they look beautiful! Wish I had the light power it looks like you have!

Sorry I haven't been able to really help with your issue. It's always nice chatting though, your comments and pictures gave me information and insights that will be helpful!

Its from botanicare. 3x6 od tray
 
Siz

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When I open as little as 1 vent my humidity comes down by a lot.

I tried adding a second intake fan but still cant keep it down without opening a vent. This is fine with lights on but I will have light leaks for lights out.

Added pics to show fans
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