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8x4 Tent, 10-12 plants-- exhaust fans?

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8x4 Tent, 10-12 plants-- exhaust fans?

XxHammer 29 Replies 11,566 Views
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XxHammer

XxHammer

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#1
Alright. I am going with an 8x4 Tent

What size exhaust fans and how many?

Will be running 2 SpiderFarmer SF4000 LED lights or very similiar.
 
#2
At least a 6" AC Infinity or similar quality company, 8" would be better.
 
#6
I use a 6”Canfan in the tent on a dialASpeed. Various other air moving fans. Passive intake from lung room. Then another 6” in the lung room that vents outside.
 
#7
Jump on the net and look up cfm calculator for cfm requirements of your room .width,length height then add 25% for bends ducting and carbon filter etc..
 
#9
Mr.GreenthumbOG said:
I use a 6”Canfan in the tent on a dialASpeed. Various other air moving fans. Passive intake from lung room. Then another 6” in the lung room that vents outside.
Click to expand...

Ive heard this term "lung room," used several times now. I need to learn more....

Madmax said:
Jump on the net and look up cfm calculator for cfm requirements of your room .width,length height then add 25% for bends ducting and carbon filter etc..
Click to expand...

Thank you. I did not know such a thing existed.

LexLuthor said:
I think 1 8" would be big enough for an 8x4 tent.
Click to expand...

Thanks. I will hear out a few more people but I think youre right.

I will be adding other fans for air movement. This is just for exhaust purposes...


I will be parking the 12k BTU Toshiba Portable AC inside the Grow Tent for Temp Control. With it exhausting outside
 
#10
My room is 4x8 with 8 foot ceiling. I have 10 feet of suction hose from filter to exhaust blower. Then about 40 feet of discharge ducting to get it outside. I am using a 265 cfm blower on 4” duct. Would have preferred a 6 or 8 duct but I am using an extra dryer vent to get it outside. Works fine. Temp and humidity are good and you can’t smell a thing standing next to the door of my room.
 
#11
GO 8" AC Infinity and never look back..
You could easily fill a 4x8 with 6 PLants.. Just a suggestion.
 
#12
freezeland2 said:
My room is 4x8 with 8 foot ceiling. I have 10 feet of suction hose from filter to exhaust blower. Then about 40 feet of discharge ducting to get it outside. I am using a 265 cfm blower on 4” duct. Would have preferred a 6 or 8 duct but I am using an extra dryer vent to get it outside. Works fine. Temp and humidity are good and you can’t smell a thing standing next to the door of my room.
Click to expand...

Since youre already doing a 8x4 and youve always been nice and helpful, ill probably pick your brain a bit

What lights do you use? How many plants can you comfortably grow?
 
#13
30roll said:
GO 8" AC Infinity and never look back..
You could easily fill a 4x8 with 6 PLants.. Just a suggestion.
Click to expand...

This is what I am leaning towards.

Do you think the controller is worth it?

I liked those TerraBlooms cause they have just a speed adjust knob. Which seems like enough for my needs. The whole digital controller feels like overkill for my use BUT if there is no other way to adjust the exhaust fan speed, well then controller it is.
 
#14
You absolutely need a controller. Worth every penny to set it up and have it babysit your tent.
You set your high and low thresholds and the Controller does the rest. As the crop grows you'll change values like fan speed to accommodate more heat and humidity. Plus it's easy on the electric bill.
I have a Dehumidifier in my 4x8 to help because at some point, running the fan is not enough
 
#15
XxHammer said:
Since youre already doing a 8x4 and youve always been nice and helpful, ill probably pick your brain a bit

What lights do you use? How many plants can you comfortably grow?
Click to expand...

I am using a hlg scorpion Rspec. I have 4 plants sitting under it. 6 would fit fine. More than that a second light would get hung. If I did add a second light 12 plants would fit nicely in the room. You have 32 sq ft of floor space. I don’t use all of it because 4 plants are enough for me. I like to be able to move around in the room to do maintenance etc. I also have my reservoir outside of the room. It’s not hydro, I am running a drip irrigation system. I also keep supplies etc in the room where the reservoir is. The only thing in my room is the plants, the exhaust fan mounted to a wall, a fan at under canopy height, and my light hanging above.
 
#16
the ac in the tent?
 
#17
lvstealth said:
the ac in the tent?
Click to expand...

That is the plan. That way it can actually use the built in temp control settings on the unit.

The settings are much harder to regulate when the unit is in a cooled room

As long as I exhaust the air out of the tent, is there any issue?
 
Last edited:
#18
30roll said:
You absolutely need a controller. Worth every penny to set it up and have it babysit your tent.
You set your high and low thresholds and the Controller does the rest. As the crop grows you'll change values like fan speed to accommodate more heat and humidity. Plus it's easy on the electric bill.
I have a Dehumidifier in my 4x8 to help because at some point, running the fan is not enough
Click to expand...

Im not sure if I will need a dehumidifier or not. That is one pro of Arizona. Extremely dry climate. Humidity is never usually over 10-15% unless I am running a humidifier. Or later in Flower when the plants are bigger I am able to maintain a humidity of around 35-40%
 
#19
20210410 211454 HDR


That is the AC unit. It is on wheels. Id like to get rid of the ducting (the intake one) and just place the unit inside a larger sized tent. It has a 6" exhaust duct that would still go out the tent and out a window
 
#20
put it outside the tent, put it in always on mode, use an inkbird controller, or a smart setup - not the units thermostat.
 
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