8" Hoods vs 10" Hoods

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Extacie

Well-Known Member
Trying to upgrade a couple lights and wondering what people think on the two? I am running 6" hoods now which are noisy, even with the insulated ducting/box built around the fan.. Could be my fan.. But anyways, from what i've read it seems whenever people ask, everyone always says the bigger the better.. I would assume 10" would be better, but more expensive. I also noticed less options with 10" hoods, seems as if the 8" are more popular. I was having a hard time finding similar threads/info. If anyone knows of any, re-directing would be great.

Would you all recommend getting 10" hoods, or 8" hoods with 10" ducting & a 10" fan?

Thanks!
 
superstoner1

superstoner1

Well-Known Member
Honestly, unless you plan on running more than 3 lights in a row on one fan than 6" is better. Try a vortex 6" fan they are very quiet, about $150 at plant lighting hydroponics.com. the bigger the opening the more loss of control on light concentration
 
booms111

booms111

Well-Known Member
6'' are the best based on there the most reflective. sound wise there is no noticeable difference in them. What are the 6'' hoods your trying to replace?
 
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Extacie

Well-Known Member
superstoner1 said:
Honestly, unless you plan on running more than 3 lights in a row on one fan than 6" is better. Try a vortex 6" fan they are very quiet, about $150 at plant lighting hydroponics.com. the bigger the opening the more loss of control on light concentration
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So what if someone plans on running more than 3 lights in a row? I appreciate the advice, I will def. look into the vortex fans, I have heard great things about them.

Let me make sure I understand correctly; The bigger the opening, the more loss of control on light because more light is leaking out of the ducting? Seems simple enough, I just wanted to make sure I understand correctly.
 
booms111

booms111

Well-Known Member
I got a buddy that runs 4 600hps's with 1 8'' hurricane fan. He runs all 8'' blockbuster hoods with no issues. Yes with a 8'' duct hole on hoods your loosing the 2'' of reflective material on each side of the hood compared to 6'' hoods.
 
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Extacie

Well-Known Member
Thanks everyone! booms111, from what I have read in Jorge Cervantes grow bible and several other books, the larger the ducting, the less the sound.. Which makes good sense to me. It's like whistling.. You make your lips smaller so it makes the loud noise.. If you open your mouth all the way you don't really hear noise coming out.. I know, a terrible analogy, but I was having a hard time coming up with anything to compare lol. Also, with larger ducting it would def. be easier to move larger volumes of air with less work on the fan.

In Jorge's Grow Bible he says that smart growers get 12" ducting/hoods; maybe this is completely incorrect based off what I am hearing from you all about the reflectivity?

As far as what hoods I currently have, they are sunleaves sunspot 6. Any comments on this hood/advice on new ones?
 
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Extacie

Well-Known Member
Booms, thanks for clarifying. What if he were running all thousand watters as opposed to 600, think the fan could keep up then? I've read great things about those blockbuster hoods.
 
booms111

booms111

Well-Known Member
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Extacie

Well-Known Member
booms111 said:
I run 1ks. I only run 2 on each 8'' fan. Blockbuster hoods are the best in my opinion. Switching from your sunspot to a blockbuster will be a good improvement. I run noise insulated duct work and its super quiet. Like this stuff but mine says for noise dampaning http://www.homedepot.com/p/Master-Flow-6-in-x-25-ft-Insulated-Flexible-Duct-R6-Silver-Jacket-F6IFD6X300/100396935

Check out this link http://www.greners.com/reflector-test.html
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Thanks homie. I actually read that reflector test before posting here which is why I said I have read great things about the blockbuster hoods. Seems as if they are some of the best out there based on this study.

Also, thanks for info on insulated ducting. I bought some a couple months ago and put just a small amount on the end of my setup and it seems to dampen noise a lot. Will run all insulated ducting soon, it's just so expensive!

So, if I wanted to run 8" blockbuster hoods and run 3-6 in a row (Due to a rectangular shaped grow area) would my best option be to add 8"-10" adapters and run a 10" fan/ducting? Or maybe even 12"?

Thanks again,
Ex
 
superstoner1

superstoner1

Well-Known Member
No, your best option would be to run 2 separate systems and if you insist use the 8" with 8" ducting and a good 8 or 10" fan with a speed controller.
 
kinddiesel

kinddiesel

Well-Known Member
how many fans ? lights watts . I use all 8 inch 1 monster fan splits off the 8 inchers into 2/2 so a y pipe then blows through 2 and 2 . works best . and every 4 lights has a different fan . can run 1000 watts per light . to stay cool . never seen 10 inch here in mi and I go into every hydro store for 50 miles distance of my home . never seen 10 inchers on ebay or amazon .
 
Dr. KaNobie

Dr. KaNobie

Member
I currently have 18 8" dominator hoods in 3 rows of 6 with a 10" max fan with an 8" reducer and an 8" max fan in each of of the three rows that intake and exhaust outside of the room. With my ac units off my fans keep my room at an ambient 76 degrees without co2 and 82 with co2. image.jpgimage.jpg image.jpg image.jpg
 
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Extacie

Well-Known Member
kinddiesel said:
how many fans ? lights watts . I use all 8 inch 1 monster fan splits off the 8 inchers into 2/2 so a y pipe then blows through 2 and 2 . works best . and every 4 lights has a different fan . can run 1000 watts per light . to stay cool . never seen 10 inch here in mi and I go into every hydro store for 50 miles distance of my home . never seen 10 inchers on ebay or amazon .
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As far as how many fans and lights i'm trying to figure that out to make a informed purchase. So you essentially run a large fan to cool 4k watts? What size fan? I am thinking 4 8" lights total and am trying figure out what would be the most efficient purchase. I found 10" Sunspot reflecetor on amazon, but overall it sounds like it would be most efficient to go with the 8" blockbuster and a large fan?
 
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Extacie

Well-Known Member
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Extacie

Well-Known Member
Thanks guys (and gals) I appreciate all of your help.

Booms, thank you for a general guideline and helping me out in general!

Diesel, that looks like one hell of a deal! I appreciate you informing me of that. I will def. keep in mind. I don't know if the noise reduction would be worth the extra $ on other fans or not. I like to be able to hear what's going on outside.. I guess I could always build a silencing box around it, that may help.
 
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