Reddit mentions of VIVOSUN 4 Inch 203 CFM Inline Duct Ventilation Fan with Variable Speed Controller

Great white and Growers Recharge seem to be more popular and well thought of.

Here is a fan with speed controller built into it

Here is my copy paste daily response to people planning on using shit tier LEDs.

> TL;DR Don't waste your cash on shit tier LEDs - buy HPS/MH/CMH if you are short on money.

> LEDs are not better in any measurable way then HID until you get to at least mid tier stuff.

> DE HPS / CMH are close to comparable to COBs. That said I believe the results of lab testing that I've seen show more usable light from Vero / Cree COBs ( and possible Citizen , but I haven't seen as much data on them). The number that you are looking for is the ppfd. This is the photosynthetic photon flux density. It is the measurement of PAR at the canopy and is measured in micromoles per second per meter squared.

> IIRC really good HIDs like Gavita DE HPS or CMH are around 1.7 - 1.8 micromoles per joule and COBs are 1.8-2.2, and quantum board type setups are 2.5+. Shit tier LEDs from amazon (mars hydro , vivaspectra) are like 1.0 or less.
> I'm not saying you can't grow bud with shit tier LEDs I'm saying you will grow more and better bud using HPS of the same $ amount vs shit tier LEDs.


In your example your spending $140 on 10 year old LED tech and getting 264W at the wall which doesn't even come close to the 40 - 50W per SF rule most people use. This $120 400W HPS will crush those Mars lights in yield and quality. This is why I say don't use LEDs unless your ready to spread that wallet wide.

Things to think about later are drying racks, jars, and trimming scissors.

Well.. If that's not working you should just buy the cheapest carbon filter + fan on amazon and be done with it IMO.

Although, even with a good filter and fan you have to have some negative pressure meaning that you have to suck out more air than you pull in. If you can't get negative pressure then the smell can leak out. If you have a tent and you get a real fan and filter you'll see the walls suck in when you close the tent and that means theirs negative pressure.

Here's some amazon links.

Filters-
https://www.amazon.com/VenTech-Carbon-Charcoal-Control-Filter/dp/B00QLB5U70/ref=sr_1_9?ie=UTF8&qid=1480987037&sr=8-9&keywords=carbon+filter

https://www.amazon.com/VenTech-Carbon-Charcoal-Control-Filter/dp/B00QLB5U70/ref=sr_1_9?ie=UTF8&qid=1480987037&sr=8-9&keywords=carbon+filter

Fans-
https://www.amazon.com/Apollo-Horticulture-Variable-Controller-Ventilation/dp/B01C6IJSB0/ref=sr_1_11?ie=UTF8&qid=1480987316&sr=8-11&keywords=inline+fan+4%22

https://www.amazon.com/VIVOSUN-Inline-Variable-Speed-Controller/dp/B01CTM0H6I/ref=sr_1_14?ie=UTF8&qid=1480987316&sr=8-14&keywords=inline+fan+4%22

Or just get a whole kit..
https://www.amazon.com/VenTech-VT-IF4-CF4-B-Controller/dp/B005GJ7TFE/ref=sr_1_8?ie=UTF8&qid=1480987446&sr=8-8&keywords=inline+fan+4+inch

that's a duct booster. it won't have the power to properly exhaust your tent, especially if you're using that filter. i would look at something more like this. i can't vouch for that fan, but it will be a lot better than the booster.
in terms of pushing or pulling, i've been told it's better to pull through the filter than to push, idk, maybe something to do with how long the carbon will stay effective. i personally have my tent setup to push through mine right now, as the fan is a lot smaller than the filter so i elected to put the filter outside. either works tbh.

Giantex Indoor Grow Tent Room Reflective Mylar Hydroponic Non Toxic Clone Hut 6 Size (32''X32''X63'') https://www.amazon.com/dp/B00PXK7ICK/ref=cm_sw_r_cp_api_UhVuybY2C4CHS

Roleadro 2nd Generation 600W LED Plant Grow Light Upgraded Full Spectrum Indoor Growing Light with 120pcs 5W Chips https://www.amazon.com/dp/B01IVQ96MW/ref=cm_sw_r_cp_api_diVuybHJCV7XV

VIVOSUN 4 Inch 203 CFM Duct Inline Fan with Variable Speed Controller https://www.amazon.com/dp/B01CTM0H6I/ref=cm_sw_r_cp_api_BiVuybSGHVZTE

Century 24 Hour Heavy Duty Plug-in Mechanical Timer Grounded https://www.amazon.com/dp/B00MVFF59S/ref=cm_sw_r_cp_api_nkVuybNGBW6PS

MacDoDo PH-02 Digital PH Meter Tester Best For Water Aquarium Pool Hot Tub Hydroponics Wine - Push Button Calibration Resolution 0.01 / High Accuracy +/- 0.05 - Large LCD Display - 100% Guaranteed https://www.amazon.com/dp/B01JOHTMEO/ref=cm_sw_r_cp_api_MkVuybZ08V91M

VIVOSUN Pair of 1/8" Adjustable Grow Light Reflector Clip Hanger Rope Ratchet with Zinc Alloy Internal Gears 75lb Each https://www.amazon.com/dp/B00P7TZNPQ/ref=cm_sw_r_cp_api_nlVuyb1Q8670K

This is my setup, my fan is coming in today and my seedlings sprouted this morning. I did quite a bit of research and The light is a little underpowered but I was on a pretty tight budget and can always add more light later.
I spent $40 on seeds and super soil mix from Mephisto genetics, going a more organic route and won't require nutes.
I also spent about $30 on peat moss, perlite, and compost. I already had some ducting and pots.

just want to chime in here, I was in the same boat as you. Starting out as just an experiment seeing if I could actually sprout a seed, turned into a dedicated project :p But I can tell you I didn't have any idea with like lights, tents, air filters etc. So first thing I bought was this LED , but a better option would be this Viparspectra (the one I bought though has been just fine) and just hung it in my closet with the plant, and that's it. veg'ed it for 4 weeks just like that with the light on a timer and my closet door closed. (get a little desk fan to to move some air over the leaves) Then I figured I'd switch to flower, and was kinda on the edge about investing in a tent and carbon filter. but every thread I read about smell, veterans would always say "It's gonna smell a lot!" So I bit the bullet and got a 2x2x4 tent and this carbon filter and fan . You can probably use your DIY carbon filter just fine. Anyway, long story short, I started to flower and literally two days later I walk into my house after work and the smell just hits me. And this is just one plant. So definitely invest in that stuff. But as for the PC fan, unfortunately it's not going to have enough static pressure to force air through a carbon filter. You don't have to go with the one I got, like brotha said the duct boosters will work too. If you have any question let me know cause I relate very well to your situation, except I've now been halfway through the process lol. pm me if you want

Something like this https://www.amazon.com/VIVOSUN-Inline-Variable-Speed-Controller/dp/B01CTM0H6I is what you should be using with a carbon filter.

this one is great, high quality and all you can hear is it moving a lot of air.

https://www.amazon.com/gp/aw/d/B01CTM0H6I/ref=mp_s_a_1_1?ie=UTF8&qid=1481517924&sr=8-1&pi=AC_SX236_SY340_FMwebp_QL65&keywords=vivosun+203

https://www.amazon.com/gp/aw/d/B01CTM0H6I/ref=mp_s_a_1_1?ie=UTF8&qid=1522434096&sr=8-1&pi=AC_SX236_SY340_QL65&keywords=4in+inline+fan&dpPl=1&dpID=517%2B2qeoicL&ref=plSrch

This looks more like what I see people using. How's the brand?

Weird, your page looks a lot different than mine but its the same fan.
https://www.amazon.com/VIVOSUN-Inline-Variable-Speed-Controller/dp/B01CTM0H6I/ref=sr_1_1?ie=UTF8&qid=1516814367&sr=8-1&keywords=vivosun%2B4%2Binch&th=1&psc=1

Thanks for all of your help man, I'll be thinking of you when I get this beast set up.

Nope I own the one your talking about I believe.

VIVOSUN 4 Inch 203 CFM Inline Duct Ventilation Fan with Variable Speed Controller https://www.amazon.ca/dp/B01CTM0H6I/ref=cm_sw_r_cp_apa_E5BSAbG6PBC7B

They have another that was 10$ more then this one that I couldn't figure out the difference of. But the controller is built into the cable no installation needed.

It depends what fan you have. If you wanna spend $100 you can get one that’s way quieter. I have this one VIVOSUN 4 Inch 203 CFM Inline Duct... https://www.amazon.com/dp/B01CTM0H6I?ref=yo_pop_ma_swf

With mine you would probably be fine since there’s a door in the way for you. I can’t really hear mine if I go into another room.

Vivosun! Pretty great little fans:
https://www.amazon.com/dp/B01CTM0H6I/ref=cm_sw_r_cp_awdb_t1_l9aWBbGG2NW8R

Are they sucking air out of the tent or just out of the room?

Fans like this

Comfort Zone 6 Inch Clip-On Fan | Great for Table Tops, Night Stands and anywhere you need Light https://www.amazon.com/dp/B000U9V47E/ref=cm_sw_r_cp_api_DNq0AbD8QY6YQ

Or like this?

VIVOSUN 4 Inch 203 CFM Inline Duct Ventilation Fan with Variable Speed Controller https://www.amazon.com/dp/B01CTM0H6I/ref=cm_sw_r_cp_api_oOq0AbW0Q1Q5X

Also, are you exhausting from the ports at the top of the tent or the bottom?