ventilation and exhaust fans

chocolopee

chocolopee

Member
Hello guys,just upgraded my grow room to 1,2x1,2x200m tent and was thinking to buy vent and exhaust fans, my Temps is around 24-27c with 400w hps without vent or exhaust fans but the summer coming and the temps will rise and soon iam gonna upgrade to 600w cooltube so I found those cheap fans because iam tight budget what you suggest me to buy http://www.amazon.com/Maximum-Horticulture-Premium-Efficiency-booster/dp/B00T9YX5Z0/ref=sr_1_4?ie=UTF8&qid=1427365805&sr=8-4&keywords=4+inch+exhaust+fan
or http://www.amazon.com/VenTech-DF6-Duct-Fan-240/dp/B005KMTYFK/ref=sr_1_3?ie=UTF8&qid=1427366066&sr=8-3&keywords=ventech+fan
or those bigger http://www.amazon.com/VenTech-DF8-Duct-Fan-400/dp/B005KMUHWY/ref=sr_1_5?ie=UTF8&qid=1427366066&sr=8-5&keywords=ventech+fan

i dont know much about the size i must choose so i need your help anyone who can help me thanks..
 
Hawk1020

Hawk1020

Active Member
chocolopee said:
Hello guys,just upgraded my grow room to 1,2x1,2x200m tent and was thinking to buy vent and exhaust fans, my Temps is around 24-27c with 400w hps without vent or exhaust fans but the summer coming and the temps will rise and soon iam gonna upgrade to 600w cooltube so I found those cheap fans because iam tight budget what you suggest me to buy http://www.amazon.com/Maximum-Horticulture-Premium-Efficiency-booster/dp/B00T9YX5Z0/ref=sr_1_4?ie=UTF8&qid=1427365805&sr=8-4&keywords=4 inch exhaust fan
or http://www.amazon.com/VenTech-DF6-Duct-Fan-240/dp/B005KMTYFK/ref=sr_1_3?ie=UTF8&qid=1427366066&sr=8-3&keywords=ventech fan
or those bigger http://www.amazon.com/VenTech-DF8-Duct-Fan-400/dp/B005KMUHWY/ref=sr_1_5?ie=UTF8&qid=1427366066&sr=8-5&keywords=ventech fan

i dont know much about the size i must choose so i need your help anyone who can help me thanks..
Click to expand...
How many of those ''cheap ones'' u got?
 
chocolopee

chocolopee

Member
none of them I was thinking to buy them but don't know which I must choose I need 1 for inline and 1 for exausth do you have any cheaper choise?
 
Hawk1020

Hawk1020

Active Member
chocolopee said:
If I buy ventech 8" 400 cfm for exhaust my inline fan must be lower or I can buy same one for inline fan?
Click to expand...
Well a 400cfm is powerful so it will prolly cause a negitive pressure so id say u let it suck air from a nice intake hole. Dont think u need two units.. But im a newbie too man. Using a room not a grow tent.. Im sure its the same content diff specs.
 
growlab420

growlab420

Member
Hey guys I'm no expert but I have a good 6 years of growing experience, The negative pressure isn't enough alone to keep the air exchange around your plants to a maximum, (Trust me, I have tried in the past) your plants will still grow and produce bud but two units is essential for optimum growth. Be it a tent or room. Most large grows that i have visited will either use air-con or a fresh air intake no matter how big or small the operation.

Peace
GrowLab420
 
growlab420

growlab420

Member
Oh, they can be both the same size if that's what keeps your room comfortable for the girls then that's cool.. I have a friend with a room that had two 8" fans one for in one for out, and the plants are loving it, he stepped up his intake with each grow and the final yield increased each grow too. That was the only variable that changed, so it was definitely the reason for the increase in yield. I'm not saying that it will work for everyone but it did for him.

Peace
GrowLab420
 
Hawk1020

Hawk1020

Active Member
growlab420 said:
Hey guys I'm no expert but I have a good 6 years of growing experience, The negative pressure isn't enough alone to keep the air exchange around your plants to a maximum, (Trust me, I have tried in the past) your plants will still grow and produce bud but two units is essential for optimum growth. Be it a tent or room. Most large grows that i have visited will either use air-con or a fresh air intake no matter how big or small the operation.

Peace
GrowLab420
Click to expand...
Six years experience is good enuf to shut my mouth lol.
 
growlab420

growlab420

Member
Hey man don't shut your mouth lol , we are all here to learn and to teach others, I'm still learning on every grow i do and will continue too..
 
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