Filter and fan size for 4 1000k?

Just signed on a commercial space and am setting up an 8 k grow. Two panda film rooms with 4 k per room with an opposite light schedual. The reason for the rooms is mostly for heat and smell. I need to completely scrub the smell and cool the room. There is one other tenant in the building and don't want to draw suspicion. I'm legal but don't need the hassle.

The plan is to set the hoods up in a square with one 8" fan running at 750 cfm and a can 100 filter. The air will be dumped into the warehouse, old building with high ceilings, then vented on a t stat with an industrial size vent fan. I can vent differently in the warmer months and have a central air system that I can directly cool the tents with. I' also going to treat the warehouse air with an ozone generator so any suggestions on those would be appreciated.

I've only cooled 2 1k lights with a 6" fan and never had any problems cooling them.

So does this sound like the right size combo? Looking for real world experience cooling this size grow.

Thanks.....

Anyone?...

your gonna need alot more fans/fan power then that buddy...

I run 735 cfm to cool 4k lights but I am drawing from outside and blowing it outside. I use a separate fan for exhaust/odor control.

Hello,

I also ran an 8" (around 750cfm) inline fan for 4 1k watt lights in a square configuration and it was sufficient. For the filter I used a Can-75 (.38 special thinner one) with the same size fan for scrubbing and it was barely enough for a 11x11 room. Hope this helps.

I would not put a carbon filter on your air cooled circuits... I would pull air from outdoors... even in the summer it works just fine. Obviously in the cooler months it is extremely effective.
A carbon filter on your aircool will suck black dust into your reflectors... it will settle over time a bit but you will still have it building up...
Also, why waste your cooled indoor air... I say a strong fan pulling air from out of doors with an intake filter on it... dump that air back outdoors or into an area partitioned off to receive the air, cool the air, then be exhausted out.

I would figure up your exhaust needs for each room then double the cfm for the filter... If you exhaust 550 cfm from each flower room then use a 1100 cfm filter, as a single pass, per room. I like Phresh filter much more than can. Lighter, cheaper and more effective, imo.

No question... separate your aircool and exhaust/odor control... i would question advice from anyone who says differently.

Also, buy fans that are larger than your actual needs and dial them in to your exact needs with a speed adjuster. With speed control you can nail the perfect negative pressure for odor control and be as efficient as possible with your cooled or heated air. Larger fans ran on a lower speed are much quiter. Also, it's good to know you always have more if you need it. There is nothing worse than finding yourself needing 750cfm and you have a 600cfm. You need a whole new piece of equipment for just a little more cfm.

I would think the Vortex 747's would do well for your exhaust... they could work for your aircool too, but possibly at full power. This depends on your setup/ducting/building.
So 4 fans total, 2 747's and 2 900cfm. Maybe just 4 747's. All with speed adjusters. Change those intake filters when needed. With long runs and or corners of duct for aircool you need air tight reflectors... take your time with foil tape and get a perfect seal (maybe new reflectors actually seal well, idk, using the same old ones here)... If the seal is compromised you will hear it as buzzing whining noise... When deciding carbon filter size, compare it to your estimated cfm after dialed in with adjuster, not the actual size... so 747 at 60% is about 450. 450 x 2 = 900 cfm carbon filter.

There is no book learned advice up there.

LIke Hank said^^^. Almost my set up to a tee. speed controlled 745 on my lights, never touches internal air. Keeps my 4 1000's nice and cool. 6" with filter thermostatically controlled for exhaust, wishing I had another 8" for exhaust though.

Thanks for all the input. I'm going to go with 8" fans lights only and one for exhaust with a filter. The rooms are going to be large tents inside a 1500 sq ft warehouse with 14' ceilings. There is a large industrial exhaust on a tstat that will control temps in the building. The fan is huge and strong enough to vent the entire building. In the summer months I can duct the ac into the tents and remove air from the building the same way as in the winter. Not sure if I can add more vents outside the building yet.

I checked out the phresh filter and I think I'm going to give them a shot.

Thanks

Sounds like a nice space.

Seeing as you will be venting the building from a fan that will not be carbon filtered... i would say you want to make sure you have a nice consistent negative pressure in your tents to make sure that every bit of air inside the tent goes through the filter. I'm thinking you already know this, but it seems like an important bit.

Sounds exciting. Good luck man.

Hmmm, maybe I need another fan for our planned 16,000 watt bare bulb room?

Was thinking 12" max can fan. One on the inlet and one on the outlet (which are located on opposite sides of the room).

Hey heartland, you have any idea what the room air exchange rate is for cooling with outside air. Obviously it changes throughout the year, but I'm thinking summertime when the air teperature difference is about 15 degrees.

It's a great space and the ac was a huge bonus. The reason I went with two tents is smell control and also I can stagger harvests because it's just me working the grow. It will also help heat the building 24hrs instead of 12 hrs lighting heat and 12 hrs of gas heat. If the warehouse does not get hot enough to vent i'll add in a co2 burner to make up the co2 levels. I don't think I'll be able to get the levels up to 1500 cost effectively but I'll hopefully keep it close to outdoor levels.

Instead of sealing the lights could I push air through the hoods so no untreated air gets sucked into the hoods and out of the tent. There would be a little leaking into the tent but not enough to interfere with the neg pressure caused by the exhaust fan and filter.


I'm also considering a Cap ozn1 ozone generator in the warehouse treating any leftover smell if any. I've used the ozone jr outside a small tent and it works pretty well but not enough to put a dent in the warehouse. Has anyone used one of these?


I signed the lease yesterday and construction starts as soon as the gas is turned on and the plumber turns the water back on. Then I'm free to set up and go. It's very exciting but also stressful because I'm putting a lot on the line and I don't have any partners. I have veg plants that need a home it 2 weeks and a Cloner full of cutttings for tent #2.. So the race is on

legallyflying said:

Hey heartland, you have any idea what the room air exchange rate is for cooling with outside air? .

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I am not sure. Your plans are a 180 from what I have done. The air here is 85-110 for half of the year... no matter how fast the air exchange, ac is needed much of the year... lots of people like to use co2 and seal their grow here. I'm just not into that.

I'm not sure if you saw that the 747 rec was with a speed adjuster to dial it back. 700 cfm for just a 10x10 would be a little too much imo.

I am super jealous of you guys with basements.

i have never tried pushing the light through an aircool. i've always understood that pulling is the way to go. It has definitely worked for me in the past. You can seal up the reflectors really well with foil tape. If there is a leak you will be able to hear it and patch it up.

If you are really concerned about the leaking, you could always use 2 smaller fans for each aircool circuit... one for in and one for out... I would think that would balance any pressure/neg pressure inside the reflectors.

Thanks heartland. I am signed up for an "off peak" power plan so in order not to get totally rapped for power I run everything at night. Nighttime temps in the summer months are around 65-70 here. I think we are going to try a squirrel cage fan and see how it works... it pushes like 1600 CFM under a decent stattic load.. that flow would replace all the air in the room in three minutes.

I hear you on the sealed room and I would like to get there by the fall. But we are talking 6 tons of AC an that is going to cost around $7k when its all said and done. People dream about growing commercial but I am hear to tell you, jesus fucking christ it gets expensive in a hurry!!!

Oh yeah.. Pulling the light through the hoods is more efficient for sure. Turn on your hood fans and turn off all the oscillating fans. Use a burning stick of incense..or a splif.. to look for air leaks in your room and your hoods. Lastly, try blue painters tape for hood sealing. It comes off sooooo much easier when its time to change bulbs!

My rooms are now going to be 10x20 each so I'll have room to add more lights if I can handle the temps and room to work. In the winter months i may be able to handle 6 to 8 k per side. Not sure if it'll happen this year, i guess i'll see when i fire up the 4. It may not be a problem to adding two more. I will just add another fan and split the light run up into 3 lights per fan. Veg room is 8 x 16 and was used as an office by prior tenants so that's all ready to go. Two 400 mh and assorted t-5's will go in that room. A 6" fan and filter will vent that room.

The gas is getting hooked up Monday and the owners plumber is coming to hook up the water and check the furnace tues or weds. When the door closes behind him construction on the rooms starts. First room should be on 12 x 12 by December 21st...

You're right legally, it does get expensive fast but the end results will justify the investment. It's a ton of work too. I've been growing medically for 5 years but not on this scale. So anything more than 2 k in lights is new to me. I know I'll have to tweak everything but I don't want to be buying new filters or fans half way through the grow. The advice is appreciated.

The 5 ton central ac was a huge bonus when I looked at the space. That will save my summer even if I can't run full capacity it'll still be worth it.

Yeah lots of work for sure Hey man, if your going to run more than 30 amps of lights I can shoot you a diagram on how to build a light controller.

I would also think about just connecting the rooms with two fans. That way you will reduce temperature differences between day and night and really take advantage of the flip flop set up.

Don't stress about having enough fan power on the hoods. AC hoods are cool but for this next room I'm pretty much saying fuck it and just blasting everything with AC. I'm in a residential area however which carries a certain amount of issues.

Can't wait though, this room is going to be tighter than a nuns cunt

Thanks but I already have two cap 8 light controlers that I'm going to use. I have 2 extra 6" fans that I can use if the temps drop too much, like I said there are going to be tweaks along the way. That's why I'm starting with 4 per side and can up it to 8 if heat isn't a problem, more likely 6 per side in the winter and the ac will determine how many I can run in the summer. It's a 5 ton ac unit so I'm pretty sure I can run 4k per side with that size ac.

Smell has to be kept down so I ordered two 10 fans and two phresh 10 x 39 1400 cfm filter. I figured oversized filter was better than undersized. I also got a cap onz 1 just to make sure I get all the smell...

NoBarriers said:

Thanks but I already have two cap 8 light controlers that I'm going to use. I have 2 extra 6" fans that I can use if the temps drop too much, like I said there are going to be tweaks along the way. That's why I'm starting with 4 per side and can up it to 8 if heat isn't a problem, more likely 6 per side in the winter and the ac will determine how many I can run in the summer. It's a 5 ton ac unit so I'm pretty sure I can run 4k per side with that size ac.

Smell has to be kept down so I ordered two 10 fans and two phresh 10 x 39 1400 cfm filter. I figured oversized filter was better than undersized. I also got a cap onz 1 just to make sure I get all the smell...

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I run a tiny grow but am very happy with Can's MaxFan and Phresh charcoal. I definitely agree with the folks advising you separate your cooling and filtration circuits.
The other reason for choosing more and smaller fans is that if one fails, the other(s) will hold you in survival mode while you repair/replace the failed unit. cn

Everything I have read about phresh has been good so that's why I went that way. I have a few extra fans for backups and I also high temp cut off on my lights for added protection. I have been doing small grows for 5 years and just decided to go bigger 3 weeks ago.

Just received my Active Air fan speed control. The thing is great for reduction of noise and energey. I will say that after looking at the internals that instead of paying 23-26 bucks your better off going to hardware store and buying a simple light dimmer/fan adjust switch. Those greedy ______(insert filter manuf. or/and hydro store owner here) want to convince you that you could burn up your fan by doing so but a AC electric flow switch is same as same, no diff. internally one bit. The only exception is the very large exhaust fans which wont work with the AA control either.