Question about the ventilation of a 3'x3'x6' tent

W

Wololo

Member
My seeds will be arriving the next week, and I need to decide the exhaust set up. Since i live in a really cool place, i was planting to buy a ~110cfm inline fans and a ~110cfm carbon filter. I'll be using a 600 w mh/hps.
I dont have many options where i live, and those too seems to be nice together.
I couldn't find a consensus online, so i came ask for your help. Thank you guys very much.
https://www.amazon.co.uk/Hydroponic-Grow-Room-Fan-Extractor/dp/B00E0ELQJ6
http://m.ebay.de/itm/RAM-08-350-150-Kohlestoff-Luftfilter-100-200-4-Zoll-170m-hr-/302011242519
P.s. i am not going to buy from these links. Ilustrative purpose only :p
 
justugh

justugh

Well-Known Member
Wololo said:
My seeds will be arriving the next week, and I need to decide the exhaust set up. Since i live in a really cool place, i was planting to buy a ~110cfm inline fans and a ~110cfm carbon filter. I'll be using a 600 w mh/hps.
I dont have many options where i live, and those too seems to be nice together.
I couldn't find a consensus online, so i came ask for your help. Thank you guys very much.
https://www.amazon.co.uk/Hydroponic-Grow-Room-Fan-Extractor/dp/B00E0ELQJ6
http://m.ebay.de/itm/RAM-08-350-150-Kohlestoff-Luftfilter-100-200-4-Zoll-170m-hr-/302011242519
P.s. i am not going to buy from these links. Ilustrative purpose only :p
Click to expand...
if u are using a cool tube to help keep the heat under controll u are going to need to 2 reducers 6 to 4 inch

if u do not have a cool tube and plan a open bulb ......your not going to like it with a hps bulb

your area comes out to be about 90 even 1 time a min the heat the bulbs are going to make is alot more then u are excepting

for this to work at what u said ......u are going to need intake temps low 58-62 F the temps in the tent will be 10 degrees hotter then the air it is pulling in atleast with my experiments
 
W

Wololo

Member
justugh said:
if u are using a cool tube to help keep the heat under controll u are going to need to 2 reducers 6 to 4 inch

if u do not have a cool tube and plan a open bulb ......your not going to like it with a hps bulb

your area comes out to be about 90 even 1 time a min the heat the bulbs are going to make is alot more then u are excepting

for this to work at what u said ......u are going to need intake temps low 58-62 F the temps in the tent will be 10 degrees hotter then the air it is pulling in atleast with my experiments
Click to expand...
Thank you for your answer.
I read on grow weed easy that you need to change the air once every minute. Some other websites say different things. That's why i came here.
According to the same site the ideal temperature is
Vegetative stage 70-85°F (20-30°C)
Flowering Stage: 65-80°F (18-26°C)
Right now my temps are at 65°f, if like you said the temps goes up 10°f i'd be ok right? At any time i can cool things down a bit, since outside is arounde 30°f.
And yes i'm using a cool tube.
 
justugh

justugh

Well-Known Member
Wololo said:
Thank you for your answer.
I read on grow weed easy that you need to change the air once every minute. Some other websites say different things. That's why i came here.
According to the same site the ideal temperature is
Vegetative stage 70-85°F (20-30°C)
Flowering Stage: 65-80°F (18-26°C)
Right now my temps are at 65°f, if like you said the temps goes up 10°f i'd be ok right? At any time i can cool things down a bit, since outside is arounde 30°f.
And yes i'm using a cool tube.
Click to expand...
np man
the rule is 1 time ever 5 mins to exchange the air minial

just to help u i think about getting a 6 inch fan with a speed controller
your area is 90 cfms a 6 inch fan does 400 cfms on full power that would be a 13 sec exhcange time .....u can lower temps faster

but this would be your hear controll ......if the temps go up u can turn it higher to keep them from breaking the bad temp zone
 
MichiganMedGrower

MichiganMedGrower

Well-Known Member
I needed a 6" fan to cool my 600 blockbuster sealed reflector in summer. And they recomend 3x per minute to cool without ac or with ambient room temp.

I use fans with speed controllers as suggested above.
 
W

Wololo

Member
justugh said:
np man
the rule is 1 time ever 5 mins to exchange the air minial

just to help u i think about getting a 6 inch fan with a speed controller
your area is 90 cfms a 6 inch fan does 400 cfms on full power that would be a 13 sec exhcange time .....u can lower temps faster

but this would be your hear controll ......if the temps go up u can turn it higher to keep them from breaking the bad temp zone
Click to expand...
My area is 54 cfm. Thats why i thought that a 110cfm would be enough. With the carbon filter a 110 cfm would be able to change the air at least once per minute.
The fan needs to be quiet too, and i dont want to spend unecessary money on a better fan because my options are limited. The best fan i could find was a 190 cfm for double the price. And then comes the problem because i need a compatible carbon filter, which is even harder to find
 
Last edited:
justugh

justugh

Well-Known Member
Wololo said:
My area is 54 cfm. Thats why i thought that a 110cfm would be enough. With the carbon filter a 110 cfm would be able to change the air at least once per minute.
The fan needs to be quiet too, and i dont want to spend unecessary money on a better fan because my options are limited. The best fan i could find was a 190 cfm for double the price. And then comes the problem because i need a compatibilidade carbon filter, which is even harder to find
Click to expand...
your english ....sorry i all my info is in feet american

https://www.amazon.co.uk/dp/B00GY17H6Y/ref=twister_B00GY1GKVW?_encoding=UTF8&psc=1

this is what u want .........the speed controll should work on this (this is like american inline fan ...works on those but not our booster fans)
https://www.amazon.co.uk/Variispeed-Fan-Speed-Controller/dp/B00HXDXBAI
ours look like this
https://www.amazon.com/dp/B00UW6CGHW

hang the filter at the top of the tent then have flexie ducting going to the end of the cool tube then run ducting to fan then ducting to ejection point
the 2 90 degree bend will slow the flow down by 10-15%

they are all 6 inch it should attach to the cooltube hood (all the ones here are 6 and 8 inches) .....the extra speed it offers will let u turn the speed controller to full and the temp should be abuot 4-6 degree different ......this way u are covered up to about 72f outside intake temp .......u can never account for everything so i am just saying build it into the system so u have it as a option if u need later without need to freak out
 
W

Wololo

Member
justugh said:
your english ....sorry i all my info is in feet american

https://www.amazon.co.uk/dp/B00GY17H6Y/ref=twister_B00GY1GKVW?_encoding=UTF8&psc=1

this is what u want .........the speed controll should work on this (this is like american inline fan ...works on those but not our booster fans)
https://www.amazon.co.uk/Variispeed-Fan-Speed-Controller/dp/B00HXDXBAI
ours look like this
https://www.amazon.com/dp/B00UW6CGHW

hang the filter at the top of the tent then have flexie ducting going to the end of the cool tube then run ducting to fan then ducting to ejection point
the 2 90 degree bend will slow the flow down by 10-15%

they are all 6 inch it should attach to the cooltube hood (all the ones here are 6 and 8 inches) .....the extra speed it offers will let u turn the speed controller to full and the temp should be abuot 4-6 degree different ......this way u are covered up to about 72f outside intake temp .......u can never account for everything so i am just saying build it into the system so u have it as a option if u need later without need to freak out
Click to expand...
Is my english that bad? It is not my mother language, but i try my best.

As i said in the post, "P.s. i am not going to buy from these links. Ilustrativepurpose only " I dont live in uk. It was just so you guys could see what i would buy. We dont even have amazon where i live.
I understand that a bigger one would be better, but is my first grow, I've never even smoked weed in my life, i dont want to spend much money on this. If the 110 really wouldn't do, tell me and i look for something else. I understand the idea of future proof, but it do not apply in my case.
Thank you for the help
 
justugh

justugh

Well-Known Member
Wololo said:
Is my english that bad? It is not my mother language, but i try my best.

As i said in the post, "P.s. i am not going to buy from these links. Ilustrativepurpose only " I dont live in uk. It was just so you guys could see what i would buy. We dont even have amazon where i live.
I understand that a bigger one would be better, but is my first grow, I've never even smoked weed in my life, i dont want to spend much money on this. If the 110 really wouldn't do, tell me and i look for something else. I understand the idea of future proof, but it do not apply in my case.
Thank you for the help
Click to expand...
your english is better then mine ....be proud of that

110 will work

if u never smoked weed before ......pick a weaker strain u do not need anything higher then 10-12%
sinnce u are new to this i would say look at a auto flower seeds.......this will remove some variables from the grow letting u work on feeding the plant
(auto flowers grow under any light wave and under any time frame ......so it takes those out of the growing for u ....plus it is cheaper then photos)
 
W

Wololo

Member
justugh said:
your english is better then mine ....be proud of that

110 will work

if u never smoked weed before ......pick a weaker strain u do not need anything higher then 10-12%
sinnce u are new to this i would say look at a auto flower seeds.......this will remove some variables from the grow letting u work on feeding the plant
(auto flowers grow under any light wave and under any time frame ......so it takes those out of the growing for u ....plus it is cheaper then photos)
Click to expand...
Thanks, but i already orderered the seeds with the help from the people here. Went with photos, since i had already a hps, a m/h and the ballast and i already have some experience with gardening. I will buy the 110 then, thanks.
 
You must log in or register to reply here.
Top