tent 400 watt hps

grorite

Well-Known Member
ive been shopping around but need to know what size tent i should get to run a 400 watt hps? ill be switching as soon as my cfl grow is over. also what size inline fan should i get? any other things i should be looking into getting
 

ru4r34l

Well-Known Member
4' x 4' tent for 400W is a good start, also a 440+ CFM fan with like rated filter would be ideal.

regards,
 

Dutchmast3r

Active Member
i would get a 3x3 thts there footprint pretty much..a 4x4 is like the maxxx for a 400w..

i ran a 400w a few grows ago in a 3x3 by 7ft tall tent with only a duct booster fan ($25 on amazon) venting from the top and bottom vents open always, and a fan inside mixing it up..temps never got over 85F and this was summer time..room wasnt a/c but the hallway was soo good luck man
 

Slipon

Well-Known Member
4x4 is good, yes the foot print is 3x3 or what ever, but its always nice to have a little room to work with, so unless your really on a tight budget I would go for the 4x4

about ventilation, 440 cfm might be right (have`t done the mat) but it also depends, on your temperatures and if your run a cool tube (I would strongly advice you to get one, the grow will be much more easy and result will be better as your able to keep the light close, so top buds get even more light and bottom buds actually can grow in to nice smokeable buds)

I reccon a nice good quality 4" could work with a cool tube and a 400W, tho agin, budget, if you can spare the extra 40$ go for a 5" with speed control
 

grorite

Well-Known Member
4x4 is good, yes the foot print is 3x3 or what ever, but its always nice to have a little room to work with, so unless your really on a tight budget I would go for the 4x4

about ventilation, 440 cfm might be right (have`t done the mat) but it also depends, on your temperatures and if your run a cool tube (I would strongly advice you to get one, the grow will be much more easy and result will be better as your able to keep the light close, so top buds get even more light and bottom buds actually can grow in to nice smokeable buds)

I reccon a nice good quality 4" could work with a cool tube and a 400W, tho agin, budget, if you can spare the extra 40$ go for a 5" with speed control
thats what ill do thanks ill be ordering sometime next month was planning on a cool tube ill also look into the 5" budget will be just about unlimited want to get the most i can out of a 400 watt wish i could go bigger but i cant where i live people come in and inspect twice a year so i gotta keep it kinda small and as smell free as possible it will be going deep in a closet
 

Slipon

Well-Known Member
ok if you want to get the most out of it, go for a light that can run both MH and HPS and use MH in Veg and HPS in flowering,

a 400W is able to grow some nice buds, but a cool tube will make a hugh different on the lower buds as your able to keep the light much closer,

sumthing like this:

cool tube reflector maxi bright ballast__47538.jpg


if your able to use a little extra here, go for a cool hood instead, will spread the light and reflect it much better,

sumthing like this:

Grow-Light-Medium-Reflector-Hood-6.jpg


grow 4 nice plants with a veg time on 5 weeks or so, or some kind of scorg/SoG and grow 9 small plants (maybe auto`s ?) and flower early ..
 

grorite

Well-Known Member
ok if you want to get the most out of it, go for a light that can run both MH and HPS and use MH in Veg and HPS in flowering,

a 400W is able to grow some nice buds, but a cool tube will make a hugh different on the lower buds as your able to keep the light much closer,

sumthing like this:

View attachment 2369419


if your able to use a little extra here, go for a cool hood instead, will spread the light and reflect it much better,

sumthing like this:

View attachment 2369426


grow 4 nice plants with a veg time on 5 weeks or so, or some kind of scorg/SoG and grow 9 small plants (maybe auto`s ?) and flower early ..
alright i figured i would need a light that ran both that was my plan is there anything else i should get
 

grorite

Well-Known Member
what kind of yeild can you get with a 400 im just looking to have enough to last grow to grow extra would be nice all will be personal smoke for 2 people and we only smoke 2 jays a day one in morning and one a night
 

Brokeoldbloke

Active Member
thats what ill do thanks ill be ordering sometime next month was planning on a cool tube ill also look into the 5" budget will be just about unlimited want to get the most i can out of a 400 watt wish i could go bigger but i cant where i live people come in and inspect twice a year so i gotta keep it kinda small and as smell free as possible it will be going deep in a closet
If your going to use a cool tube then consider using a 6" fan. Since 6" is one of standard sizes for cool tubes, CFs and ducting. You'll have a lot more choice of like size products over a 5".
 

grorite

Well-Known Member
If your going to use a cool tube then consider using a 6" fan. Since 6" is one of standard sizes for cool tubes, CFs and ducting. You'll have a lot more choice of like size products over a 5".
alright i still have time to look around just trying to get ideas thanks
 
Well the cubic feet of a tent that is 4'x4'x6'8" is like 109 cubic feet i believe.. So a 400+ cfm fan is going to change ALL the air in your tent every 15 seconds..

I was thinking somewhere along the lines of DIY (mostly ducting parts) carbon scrubber into a 6" inline fan pulling 160cfm through a cool hood ducted to another 6" inline fan going out of the tent. The two fans isolated in the same system will provide if my "smart" friend is correct right around 220 actual cfm, so my tents air will be completely swapped out 2 times a minute.
 
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