help

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davygee1977

Well-Known Member
Hi guys need a bit of info please. I have just got a 2.4m x 1.2m x 2 m tent 2 600 watt hps lights and a 5 inch carbon filter. Will I need a air intake fan? Is the carbon filter alone enough to keep my temps down? Also how many plants would be good. I am a new grower. Any info would be greatly appreciated
 
DemonTrich

DemonTrich

Well-Known Member
your gonna need more than just an intake fan if you want temps below 80*. with your setup, your probably gonna be running 87* plus, and be hard bent to get your temps below that w/o a/c + an intake fan. chances are your going to need an 8000btu portable ac unit (at the very minimum) AND an intake fan. also you need to match your carbon filter to the exhaust fan and match that to your room size and the intake fan.

I used to run 2x600hps in air cooled hoods, 6" intake with 8k portable ac, custom monster custom built carbon scrubber matted to a 6" 440cfm fan at 100%, PLUS 2x18" fans blowing directly under each hood to dissipate the hot pocket of air under the glass. I was running 65* incoming air temp, 81* under each hood (12" away from glass/bulb), 72* floor temp, 74* 4' above floor.
 
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davygee1977

Well-Known Member
DemonTrich said:
your gonna need more than just an intake fan if you want temps below 80*. with your setup, your probably gonna be running 87* plus, and be hard bent to get your temps below that w/o a/c + an intake fan. chances are your going to need an 8000btu portable ac unit (at the very minimum) AND an intake fan. also you need to match your carbon filter to the exhaust fan and match that to your room size and the intake fan.

I used to run 2x600hps in air cooled hoods, 6" intake with 8k portable ac, custom monster custom built carbon scrubber matted to a 6" 440cfm fan at 100%, PLUS 2x18" fans blowing directly under each hood to dissipate the hot pocket of air under the glass. I was running 65* incoming air temp, 81* under each hood (12" away from glass/bulb), 72* floor temp, 74* 4' above floor.
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davygee1977

Well-Known Member
My temps going to be too high then with what I have then mate? I was going to do it outside the tent n just put white pvc round the walls as it's a bigger space would that be better n just run the carbon filter up into the loft and out the chimney
 
DemonTrich

DemonTrich

Well-Known Member
you need to cool that room. or your grow will be hotter than the outside ambient air. veg likes 80-86*, flowering plants likes -80*.

remember, the longer ducting the more cfm your fan needs to be to push said amount of air flow. I had to upgrade all my fans from 6" 440 cfm to 8" 720 cfm fans. buy bigger than you need. as you can always put a speed controller on fans and dial them down. but you cant speed up an already maxed out fan.

post up in detail about your setup? where your tents going to be setup *underground, spare bedroom, ect), (and what temps are in your location), how are you cooling your hoods (if running air cooled, or what hoods do you have), what fan are you using for your scrubber, what fans on the inside of your tent are you using? are you putting your ballasts outside the tent (this will help with some heat, although nominal. how are you routing your scrubber exhaust? I surely hope your NOT tying the scrubber exhaust to the existing hot watr tank exhaust or furnace exhaust. this is SUPER dangerous and potentially deadly and will NOT work. and can cause the pilots to be blown out, and be horrific. if exhausting the scrubber out the house, you need to have the same amount of incoming air to make up the negative pressure difference. this is what causes the pilots to get blown out and gas settling in the household and possible explosion.
 
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davygee1977

Well-Known Member
DemonTrich said:
you need to cool that room. or your grow will be hotter than the outside ambient air. veg likes 80-86*, flowering plants likes -80*.

remember, the longer ducting the more cfm your fan needs to be to push said amount of air flow. I had to upgrade all my fans from 6" 440 cfm to 8" 720 cfm fans. buy bigger than you need. as you can always put a speed controller on fans and dial them down. but you cant speed up an already maxed out fan.

post up in detail about your setup? where your tents going to be setup *underground, spare bedroom, ect), (and what temps are in your location), how are you cooling your hoods (if running air cooled, or what hoods do you have), what fan are you using for your scrubber, what fans on the inside of your tent are you using? are you putting your ballasts outside the tent (this will help with some heat, although nominal.
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DemonTrich said:
you need to cool that room. or your grow will be hotter than the outside ambient air. veg likes 80-86*, flowering plants likes -80*.

remember, the longer ducting the more cfm your fan needs to be to push said amount of air flow. I had to upgrade all my fans from 6" 440 cfm to 8" 720 cfm fans. buy bigger than you need. as you can always put a speed controller on fans and dial them down. but you cant speed up an already maxed out fan.

post up in detail about your setup? where your tents going to be setup *underground, spare bedroom, ect), (and what temps are in your location), how are you cooling your hoods (if running air cooled, or what hoods do you have), what fan are you using for your scrubber, what fans on the inside of your tent are you using? are you putting your ballasts outside the tent (this will help with some heat, although nominal.
Click to expand...
 
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davygee1977

Well-Known Member
All I have is 2.4 x1.2 x 2.0 metre tent, 5 inch carbon filter, 5 inch intake fan, 2 600 watt hps lights, going to be in a spare bedroom temps aren't high at all as I live in britain
 
DemonTrich

DemonTrich

Well-Known Member
are your 2x600hps in open hoods, bare bulbs, air cooled, ect? your 5" scrubber fan, is that a booster fan or a h/o (high velocity fan)?

post up some pics of the hoods, scrubber and fan and tent/setup..

but from what you've mentioned, your going to definitely run into heat issues. I don't see how you can possibly run 2x600hps with out an air conditioner, unless its winter year round and your drawing in outside winter air into your air intake. once summer hits (im not familiar with Britain's yearly weather cycles), your gonna be hitting 85+, im guessing 90's. which wont grow any weed properly or that's useful. even if you have 2x8" 720 cfm fans and running air cooled hoods, your canopy temps will still be 85*+, and even having 2x 18" oscillating fans to blow the hot pocket of air away, still pushing 85*.
 
tyke1973

tyke1973

Well-Known Member
I would buy a larger exaust fan then a 5" tents do run hot yes you will still need a inlet
 
DemonTrich

DemonTrich

Well-Known Member
even if you remove the tent, you still have heat to remove. a fan and scrubber will remove a few * of heat, but those 2x600 produce a lot of heat. just because you removes the tent means nothing. it means the hot ass air trapped in a tent, will now be trapped in the larger room. it might take an hr or 2 to get hot, but its gonna get hot. you can keep trying to put a band aide on the on the situation, but you still need air conditioning for those 2x600 lights.

I started off in a 4x4x7 tent with 1x600hps growing in a basement with ambient temps of 73-75*. AND a 6" 440 cfm fan at 100% with an air cooled hood, my temps were still 85* (NO a/c). with 2x600 hps in a 5x10x7 tent with 2x600hps with 2x6" 440cfm fans in air cooled hoods growing in a basement (73-75* temps) AND running an 8k btu ac my temps were still 80*. you still going to run into heat issues.
 
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davygee1977

Well-Known Member
Thanks guys for the info I guess I am going to have to go back to the drawing board and come up with something, very much appreciated
 
Greenhouse;save

Greenhouse;save

Well-Known Member
Listen my friend ....I live in the UK and have pretty much the same set-up as yours and I'm afraid to say this will not be enuff to keep your tent at the desired temps.....as demon said your temps will soar above were they should be.....I'm currently looking at getting myself a portable ac unit to counter the heat that is currently in the room my tent is in......yes you could beef your fans up but if I were you I would bite the bullet and get yourself a reasonably priced 10'000 btu ac unit.......not cheap £300 for a decent one.....but.......trust me this is imo your only way forward......or you could be like me and find out the hard way.......everything demon said I totally agree with......
 
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davygee1977

Well-Known Member
Greenhouse;save said:
Listen my friend ....I live in the UK and have pretty much the same set-up as yours and I'm afraid to say this will not be enuff to keep your tent at the desired temps.....as demon said your temps will soar above were they should be.....I'm currently looking at getting myself a portable ac unit to counter the heat that is currently in the room my tent is in......yes you could beef your fans up but if I were you I would bite the bullet and get yourself a reasonably priced 10'000 btu ac unit.......not cheap £300 for a decent one.....but.......trust me this is imo your only way forward......or you could be like me and find out the hard way.......everything demon said I totally agree with......
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Yeah mate I took on board what he was saying can't argue with experience, never done a grow in my life so need to listen, might just use the one 600 watt get a grow on the go n then upgrade if that's successful, surely one 600 watt with 5" extractor and intake fan and a couple of clip on fans should keep the temps at bay?
 
Greenhouse;save

Greenhouse;save

Well-Known Member
Yes it will .....but.....inevitably you will need one to make best use of the space you have......you should and could make some pretty awesome weed with the set-up you have.......
 
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davygee1977

Well-Known Member
Greenhouse;save said:
Yes it will .....but.....inevitably you will need one to make best use of the space you have......you should and could make some pretty awesome weed with the set-up you have.......
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Thinking of growing 4 monsters what size of pots Shud I use? Any nutrients u can advise on that aren't too technical? I was looking at biobizz as it relatively cheap compared to others, don't want to spend too much on a grow that I could mess up as it's my 1st. Thanks again
 
DemonTrich

DemonTrich

Well-Known Member
that 5" is NOT gonna cut it either for enough exhaust cfm. im guessing here, and im pretty sure im correct, you are wanting to use a booster type fan instead of a high velocity (high output) fan. the booster is nothing more than a glorified table fan stuck in a small round metal sleeve. nothing more. you can skimp out on a few grow equipment needs, lighting, and cooling are not something to skimp out on if you don't want to waste your time, money, and grow something decent.

KISS is the key for new growers, and seasoned vets alike. overthinking things can lead to failure. as can utilizing the wrong type of equipment, seeds, clones, soil, environment.

I researched for 1.5 years before I bought any equipment or bought my 1st batch of seeds. 4+ years later im doing pretty good. it helped me out tremendously what I learned before buying and attempting to grow.

there is a wealth of info about growing mj on quite a few forums. ALOT is horrible advise, some is excellent. you just need to use common sense and determine what is truth and what is garbage. take your time, and don't rush into it. it can save you a lot of money and headaches in the long run.



greenhouse, I used to run a LG 8k btu portable ac in a 4x4 w/1x600, then moved to a 5x10x7 w2x600. temps were great (max was 80* under hoods). the 8k is now my emergency backup. I now upgraded to a LG 14k BTU portable and my temps dropped 2* and turned down my 18" fans blowing under the hoods. and this is on fan speed 1, I have 3 to choose from :). I can get 62* incoming air (lowest if need be), I have mine set at 65*.
 
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davygee1977

Well-Known Member
DemonTrich said:
that 5" is NOT gonna cut it either for enough exhaust cfm. im guessing here, and im pretty sure im correct, you are wanting to use a booster type fan instead of a high velocity (high output) fan. the booster is nothing more than a glorified table fan stuck in a small round metal sleeve. nothing more. you can skimp out on a few grow equipment needs, lighting, and cooling are not something to skimp out on if you don't want to waste your time, money, and grow something decent.

KISS is the key for new growers, and seasoned vets alike. overthinking things can lead to failure. as can utilizing the wrong type of equipment, seeds, clones, soil, environment.

I researched for 1.5 years before I bought any equipment or bought my 1st batch of seeds. 4+ years later im doing pretty good. it helped me out tremendously what I learned before buying and attempting to grow.

there is a wealth of info about growing mj on quite a few forums. ALOT is horrible advise, some is excellent. you just need to use common sense and determine what is truth and what is garbage. take your time, and don't rush into it. it can save you a lot of money and headaches in the long run.
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Yeah demon I have been watching videos and reading just about everything I can for last 8 months, I just want to keep it as simple as possible for the beginning, so much talk on growing weed is like another language gets so technical at times so defo just going to be a soil grow, easy to grow strain and simple nutrients and hope for the best. I will defo look into what u have told me. Thanks again bro
 
DemonTrich

DemonTrich

Well-Known Member
I buy 90% of all my hard parts (hard parts = fans, building materials (mylar/panda/ect), ballasts, bulbs, and some myco inoculant on amazon. its 30% cheaper than in a brick and mortar store. you'll save quite a bit of coin that way. not sure if the UK has amazon available.

4 pots will fit under most hoods (all depends on style and hood light spread pattern for optimum light coverage). I run 4x pots under each hood (I run 3x600hps in flower 4.7gallon pots, and have 4-6 more off to the side 2.5 gallon). this is my tester area for new stuff.


don't get overwhelmed, a new grower and even a long term grower gets frustrated from time to time.
 
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