Perfect dehumidifier for 4x8 grow tent!!!

U

uniquecreations

Member
Hey guys , I'm running a 4x8 with 2 600w/hps , and I'm in my 3rd week 12/12.
I'm currently running a dehumidifier that pulls 10L/24h or 20 pints/24h, and it still getd so humid inside the tent, sometimes it can be up to 80% RH , so I was wondering how big and strong the dehumidifier should be for that space. It is a really old building with insane humidity levels inside the apartment . Any help would be greately appreciated!
 
JoeBlow5823

JoeBlow5823

Well-Known Member
uniquecreations said:
Hey guys , I'm running a 4x8 with 2 600w/hps , and I'm in my 3rd week 12/12.
I'm currently running a dehumidifier that pulls 10L/24h or 20 pints/24h, and it still getd so humid inside the tent, sometimes it can be up to 80% RH , so I was wondering how big and strong the dehumidifier should be for that space. It is a really old building with insane humidity levels inside the apartment . Any help would be greately appreciated!
Click to expand...
I would just go for a 70 pint unit and call it a day.

www.homedepot.com

Frigidaire 70 Pt. Dehumidifier FAD704DWD - The Home Depot

The Frigidaire 70 Pt. Capacity Dehumidifier allows you to control the relative humidity in the room with Effortless Humidity Control. The easy-to-clean washable filter captures dust from the air and keeps
www.homedepot.com
 
U

uniquecreations

Member
JoeBlow5823 said:
I would just go for a 70 pint unit and call it a day.

www.homedepot.com

Frigidaire 70 Pt. Dehumidifier FAD704DWD - The Home Depot

The Frigidaire 70 Pt. Capacity Dehumidifier allows you to control the relative humidity in the room with Effortless Humidity Control. The easy-to-clean washable filter captures dust from the air and keeps
www.homedepot.com
Click to expand...
Damn, thanks for the info , but I think that one is too big to fit in my grow space .
Would you recomm running it outside the grow space or what?
 
TintEastwood

TintEastwood

Well-Known Member
I have a 4x8x8.
A 30-pint was not enough.
A 70-pint created too much heat. (higher amperage draw also)
The 50-pint works best for my environment. I keep it in the grow room. (gravity drain if possible, emptying the bucket gets old quick - shuts down when bucket is full!)

This wifi unit is on my wish list, for when I need a replacement. Able to schedule settings. (lights on/off, etc)

Amazon.com - Vacplus 50 Pints Dehumidifier with WiFi Remote for Large Rooms, Large Capacity for Basements Bedroom & Home, Dehumidifier Removes Moisture Efficiently, Two Continuous Drainage Mode with Dehumidifier… -

Amazon.com - Vacplus 50 Pints Dehumidifier with WiFi Remote for Large Rooms, Large Capacity for Basements Bedroom & Home, Dehumidifier Removes Moisture Efficiently, Two Continuous Drainage Mode with Dehumidifier… -
www.amazon.com
 
Last edited:
U

uniquecreations

Member
TintEastwood said:
I have a 4x8x8.
A 30-pint was not enough.
A 70-pint created too much heat. (higher amperage draw also)
The 50-pint works best for my environment.

This wifi unit is on my wish list, for when I need a replacement. Able to schedule settings. (lights on/off, etc)

Amazon.com - Vacplus 50 Pints Dehumidifier with WiFi Remote for Large Rooms, Large Capacity for Basements Bedroom & Home, Dehumidifier Removes Moisture Efficiently, Two Continuous Drainage Mode with Dehumidifier… -

Amazon.com - Vacplus 50 Pints Dehumidifier with WiFi Remote for Large Rooms, Large Capacity for Basements Bedroom & Home, Dehumidifier Removes Moisture Efficiently, Two Continuous Drainage Mode with Dehumidifier… -
www.amazon.com
Click to expand...
Ok, that's more like it , thanks for the info buddy!
 
JoeBlow5823

JoeBlow5823

Well-Known Member
uniquecreations said:
Damn, thanks for the info , but I think that one is too big to fit in my grow space .
Would you recomm running it outside the grow space or what?
Click to expand...
Run it wherever your tent pulls air in from. My 50 pint is fine for my 5x5 but you say your building is humid as well so.....That kind of makes it anyones guess. I would get the 70 pint to be on the safe side.
 
U

uniquecreations

Member
JoeBlow5823 said:
Run it wherever your tent pulls air in from. My 50 pint is fine for my 5x5 but you say your building is humid as well so.....That kind of makes it anyones guess. I would get the 70 pint to be on the safe side.
Click to expand...
Ok , but I'm pulling air from outside at the moment so I'm guessing I should keep it inside the tent in this case , or not?
 
mateobeast88

mateobeast88

Member
uniquecreations said:
Hey guys , I'm running a 4x8 with 2 600w/hps , and I'm in my 3rd week 12/12.
I'm currently running a dehumidifier that pulls 10L/24h or 20 pints/24h, and it still getd so humid inside the tent, sometimes it can be up to 80% RH , so I was wondering how big and strong the dehumidifier should be for that space. It is a really old building with insane humidity levels inside the apartment . Any help would be greately appreciated!
Click to expand...

Is your RH after a foliar spray?

Or is it after a watering?

Can you give details on how your getting to 80%

For example, my room stays at a range of about 53% RH but after a decent foliar spray, which I do about 2 times a day and they FLIPPIN love in, my room gets about 73% RH but quickly retreats back to its normal state.
 
mateobeast88

mateobeast88

Member
TintEastwood said:
I have a 4x8x8.
A 30-pint was not enough.
A 70-pint created too much heat. (higher amperage draw also)
The 50-pint works best for my environment. I keep it in the grow room. (gravity drain if possible, emptying the bucket gets old quick - shuts down when bucket is full!)

This wifi unit is on my wish list, for when I need a replacement. Able to schedule settings. (lights on/off, etc)

Amazon.com - Vacplus 50 Pints Dehumidifier with WiFi Remote for Large Rooms, Large Capacity for Basements Bedroom & Home, Dehumidifier Removes Moisture Efficiently, Two Continuous Drainage Mode with Dehumidifier… -

Amazon.com - Vacplus 50 Pints Dehumidifier with WiFi Remote for Large Rooms, Large Capacity for Basements Bedroom & Home, Dehumidifier Removes Moisture Efficiently, Two Continuous Drainage Mode with Dehumidifier… -
www.amazon.com
Click to expand...
Keep in mind you can always make shift your dehumidifier to simple push the warm air out of the tent with some ducting and some strong tape to cover the exhaust vent on the dehumidifier.
 
U

uniquecreations

Member
mateobeast88 said:
Is your RH after a foliar spray?

Or is it after a watering?

Can you give details on how your getting to 80%

For example, my room stays at a range of about 53% RH but after a decent foliar spray, which I do about 2 times a day and they FLIPPIN love in, my room gets about 73% RH but quickly retreats back to its normal state.
Click to expand...
Nahh, it's always between 70-80% , I don't do foliar spray , and after the watering it goes up to 83% which is insane , I have that problem for 2 weeks now . Ladies are still looking good but I know I'll have major problem if I don't solve the humidity issue.
And I'm sorry I didn't quite get the part about pulling hot air from the grow tent . I do have an A/C running inside the tent as well.
 
P

PissingNutes

Active Member
50pt is more efficient than 30pt and less heat than 70pt and put it outside the tent on different breaker than your AC.
You'll want good airflow inside the tent on the plants.
 
mateobeast88

mateobeast88

Member
uniquecreations said:
Nahh, it's always between 70-80% , I don't do foliar spray , and after the watering it goes up to 83% which is insane , I have that problem for 2 weeks now . Ladies are still looking good but I know I'll have major problem if I don't solve the humidity issue.
And I'm sorry I didn't quite get the part about pulling hot air from the grow tent . I do have an A/C running inside the tent as well.
Click to expand...
Whats your average temperaturee?
 
TintEastwood

TintEastwood

Well-Known Member
mateobeast88 said:
Keep in mind you can always make shift your dehumidifier to simple push the warm air out of the tent with some ducting and some strong tape to cover the exhaust vent on the dehumidifier.
Click to expand...
Tried that early on, created a massively powerful negative pressure. Also keep in mind the hot dehuey exhaust is the dehumidified air you seek.

I often run sealed with AC and Co2. Only venting occassionally. I also have the choice of pulling air from my garage (lung room of sorts) or outside. Depending on current season temp/rh.

It's a juggling game for sure. Each environment is different.
 
mateobeast88

mateobeast88

Member
TintEastwood said:
Tried that early on, created a massively powerful negative pressure. Also keep in mind the hot dehuey exhaust is the dehumidified air you seek.

I often run sealed with AC and Co2. Only venting occassionally. I also have the choice of pulling air from my garage (lung room of sorts) or outside. Depending on current season temp/rh.

It's a juggling game for sure. Each environment is different.
Click to expand...
Since you run a sealed its a little different, normally I would just unzip the tent about 3-5 inches to release some slack. I'm not sure if many people do this but I make shifted some ducting to my sealing A/C and it does wonders cooling my plants.
 
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