250watt Small Percy Grow Need Help Building a cab

[Irish_traveller]

hey icmag

I'm constructing a small personal grow cab i only have
a small space too use, 2ft x 2ft x 5ft. i was thinking of
using 250watt's. of m/h does anyone no what size of
fan i need for this size of space.i aint bothered about
yield..is it possible to get 2oz from a space this size
Thanks Irish Traveller
something like this

 

[Bmac1]

Something that small can be slapped together with some 2x2's and panda film/poly. a 4" fan would be fine for that IMO.

 

[dank.frank]

While this isn't within the height you are asking...it's a bit taller - something like this would work for you...

Put a darkroom louver in between the wall separating the two sides for passive circulation between the veg and the flower.

With 250w you could probably just use a 4" Vortex / Can-Fan.



dank.Frank

 

[Irish_traveller]

hey
Bmac1 i will have a look for a 4ins rvk fans ta irish traveller...

 

[Irish_traveller]

While this isn't within the height you are asking...it's a bit taller - something like this would work for you...

View Image

Put a darkroom louver in between the wall separating the two sides for passive circulation between the veg and the flower.

With 250w you could probably just use a 4" Vortex / Can-Fan.



dank.Frank

hey Dank Frank
this is exactly what i need.its a bit more fancy than i was thinking about but defos worth me building it.thank's irish traveller

 

[bill cooper]

I would use a 5 inch fan and filter and get a fan controller to make it quieter unless noise is not a concern then i would go with the 4 inch fan and get a HPS bulb.
If it was me. i would go with 4 plants in 6 l final pots and top and supercrop so you have a even canopy with plenty of colas and you could easily get 6 oz or more if you put the effort in even allowing for some fuck ups you should still manage 4 oz at the worst imo I grow with a 250 watt and regularly get at least 6 oz and sometimes as much as 8.5 oz in a slightly bigger cupboard 2.5 x 2.5 ft x 5 high , good luck with the grow

 

[hush]

hey icmag

I'm constructing a small personal grow cab i only have
a small space too use, 2ft x 2ft x 5ft. i was thinking of
using 250watt's. of m/h does anyone no what size of
fan i need for this size of space.i aint bothered about
yield..is it possible to get 2oz from a space this size
Thanks Irish Traveller
something like this
View Image

250w is a good number for that size space. You can certainly get 2 ounces from 4 square feet. If you do things right, you can get upwards of 4 ounces in that space. I would recommend a centrifugal fan rated at least 150cfm for your exhaust, with a passive intake.

 

[Irish_traveller]

hey everyone
thanks for the quick replys & information.think i have an idea on what
i need to order cant wait too get rocking..ta irish traveller.

hey hush i see you have grown in a 2x2 space..i will have a read through it now for some tips

 

[hush]

hey hush i see you have grown in a 2x2 space..i will have a read through it now for some tips

Have at it.

I also used to have a 400 watter in there and pulled over 6 ounces:

https://www.icmag.com/ic/showthread.php?t=280772

 

[Irish_traveller]

Have at it.

I also used to have a 400 watter in there and pulled over 6 ounces:

View Image

https://www.icmag.com/ic/showthread.php?t=280772

hey hush
this looks like an excellent result kind of result i am looking
for good to no i can use 400watt Also.i was on the net looking at a
2 x 2 x 4.looks good only £80 i am itching to get started they also have a 2.5 x 2.5 x 4,,the 2x2x4 would give me 66watts per square ft..ta irish traveller

 

[Bmac1]

My first ever grow was in a Ikea wardrobe closet that I bought off craigslist for $10. Took a little hacking, a 400w and a 6"fan and filter with a speed control. Cost me about $400 and I got 7 or 7.5oz and have not looked back.

 

[dank.frank]

Yeah, my first "serious" attempt at growing was with a 400w in a 2 x 2...and I'd pull between 6-9oz depending on strain.

That box I posted above is for a 400w - thus the A/C, 6" fan, 50# filter, 2ft 4 bulb T-5 for veg and clones, etc.

The pots are 1.7 gallon rose buckets...which fill the 2 x 2 spot perfectly.

I honestly think...knowing what I know now vs what I knew when I was growing with a 400w - I could easily run the setup above and get 10+ as the standard...

It's not so much about being fancy - as it is putting in the proper equipment necessary to FULLY control your environment. If you control the environment and keep the fluctuations to a minimum - you'll have much more successful crops. Our hobby is not about trying to grow the plant...it's about fine tuning the environmental factors so the plant can perform it's natural genetic functions at the optimum.



dank.Frank

 

[Irish_traveller]

Yeah, my first "serious" attempt at growing was with a 400w in a 2 x 2...and I'd pull between 6-9oz depending on strain.

That box I posted above is for a 400w - thus the A/C, 6" fan, 50# filter, 2ft 4 bulb T-5 for veg and clones, etc.

The pots are 1.7 gallon rose buckets...which fill the 2 x 2 spot perfectly.

I honestly think...knowing what I know now vs what I knew when I was growing with a 400w - I could easily run the setup above and get 10+ as the standard...

It's not so much about being fancy - as it is putting in the proper equipment necessary to FULLY control your environment. If you control the environment and keep the fluctuations to a minimum - you'll have much more successful crops. Our hobby is not about trying to grow the plant...it's about fine tuning the environmental factors so the plant can perform it's natural genetic functions at the optimum.



dank.Frank

great post dank frank

yes the drawing you put up was excellent.its good to no i can run
400watts in this space i was thinking about a tent.but i am gonna build my own cab as i can place my intakes where i want them
also with plywood it should sound proof it a bit.and i will now
build my cab and try to control my environment.as much as i can
thank's for pointing this out to me.also i am going to go for 6ins rvk
fan with matching carbon filter..i was going to put 2 x 6ins holes for
intake is this enough ? i appreciate your help..irish traveller

 

[Irish_traveller]

environment questions

environment questions

hey icmag
i have some environment questions before i get started
on my cab thanks for any help you can give..

1.When the light is turned on, an ideal temperature for plant's is between (20ºC and 25ºC).

2.When the lights are off, the temperature should lie between (17ºC and 22ºC).

3.humidity in Veg around 60%,at start

4.humidity in flower 55% at start of flower and over flowering period reduce to 40%,

5.how far should 400watt be from tops of plants.i think 12ins

thanks everyone for all the info,think its time to start building

irish traveller

 

[dank.frank]

I wouldn't put 2 6" holes at all - I'd use 2 - 8" x 8" darkroom louvers in the door of the flowering cab - this will allow passive airflow to enter the box. Air is drawn at a level that is between the top of the canopy and the bulb - which moves the heat. That air is pulled out of flower and exhausted through the filter into the veg air...and the darkroom louver between the center wall, a single 8" x 8", will allow air in the veg area to be re-circulated back through to flower at a slower rate than the fresh air is being pulled in through the door in the flower area...creating a constant cycle of fresh air to and from both places while also maintaining the higher temps and humidity levels in the veg area.

You really don't "need" a 6" with a 400w or a 250w - but it's just what I have laying around so it's what I anticipate using...same as with the filter. It's a bit overkill...but again it's what I have lying around. If I was buying new, I'd probably just be using a 4" fan in that space as it's more than enough.

You can either frame it out with 2 x 4's or 1 x 3 boards - changes how you frame a bit - but you want to leave enough wall space to put in the insulation. Not only does that keep temps steady, but it does cut back on the noise of large fans BIG TIME.

For me, ideal temps are 68F with lights off and 76F with lights on - never going above 78F. I try and keep my humidity steady in flower around 45% - but I know there are advantages to having it up around 60-65% for the first couple of weeks in flower.

In the example I posted...the heat from the flower room is being exhausted into the veg area - this by default will increase the humidity in the veg area...and temps in veg can be a bit higher with no consequence.

I tend to keep my lights stationary just out of ease - and let plants stretch naturally towards the bulb. Rather than figuring how far to keep the lights from the plant, I tend to learn how much the plants I am growing stretch...and then veg them to size accordingly...so that by the end of stretch, they will be the distance from the bulb I desire...and yes, with a 400w, 10-12" is about right...but that can vary based on how much airflow you have sweeping over the canopy and around the bulb in general.

Just my thoughts on it...anyone else could contribute different information and you just have to decide what will work for you and your situation / budget, etc. I love the darkroom louvers simply because they are cut and paste (so to speak) airflow that is also light proof...even if they are pricey, I think they are simply awesome.

I suppose that does leave a need to put a 4" or 6" (whichever you go with) hole to connect the fan to the filter...so yeah, 1 round hole. For that, I'd use a short length of galvanized ducting, built permanently into the wall when framing. Then you can put spray foam around the interior edges of it to really seal it off. I'd also wrap metal HVAC tape around the piece of duct - to make sure it was truly air tight and didn't leak at the rivets, etc. That means you just need a couple short lengths of flexible ducting to attach to either side of the wall...



dank.Frank

 

[Irish_traveller]

I wouldn't put 2 6" holes at all - I'd use 2 - 8" x 8" darkroom louvers in the door of the flowering cab - this will allow passive airflow to enter the box. Air is drawn at a level that is between the top of the canopy and the bulb - which moves the heat. That air is pulled out of flower and exhausted through the filter into the veg air...and the darkroom louver between the center wall, a single 8" x 8", will allow air in the veg area to be re-circulated back through to flower at a slower rate than the fresh air is being pulled in through the door in the flower area...creating a constant cycle of fresh air to and from both places while also maintaining the higher temps and humidity levels in the veg area.

You really don't "need" a 6" with a 400w or a 250w - but it's just what I have laying around so it's what I anticipate using...same as with the filter. It's a bit overkill...but again it's what I have lying around. If I was buying new, I'd probably just be using a 4" fan in that space as it's more than enough.

You can either frame it out with 2 x 4's or 1 x 3 boards - changes how you frame a bit - but you want to leave enough wall space to put in the insulation. Not only does that keep temps steady, but it does cut back on the noise of large fans BIG TIME.

For me, ideal temps are 68F with lights off and 76F with lights on - never going above 78F. I try and keep my humidity steady in flower around 45% - but I know there are advantages to having it up around 60-65% for the first couple of weeks in flower.

In the example I posted...the heat from the flower room is being exhausted into the veg area - this by default will increase the humidity in the veg area...and temps in veg can be a bit higher with no consequence.

I tend to keep my lights stationary just out of ease - and let plants stretch naturally towards the bulb. Rather than figuring how far to keep the lights from the plant, I tend to learn how much the plants I am growing stretch...and then veg them to size accordingly...so that by the end of stretch, they will be the distance from the bulb I desire...and yes, with a 400w, 10-12" is about right...but that can vary based on how much airflow you have sweeping over the canopy and around the bulb in general.

Just my thoughts on it...anyone else could contribute different information and you just have to decide what will work for you and your situation / budget, etc. I love the darkroom louvers simply because they are cut and paste (so to speak) airflow that is also light proof...even if they are pricey, I think they are simply awesome.

I suppose that does leave a need to put a 4" or 6" (whichever you go with) hole to connect the fan to the filter...so yeah, 1 round hole. For that, I'd use a short length of galvanized ducting, built permanently into the wall when framing. Then you can put spray foam around the interior edges of it to really seal it off. I'd also wrap metal HVAC tape around the piece of duct - to make sure it was truly air tight and didn't leak at the rivets, etc. That means you just need a couple short lengths of flexible ducting to attach to either side of the wall...



dank.Frank

hey dank frank
thanks for taking the time to write the above post
this tells me everything i need to build my cab.only thing i need too do is go online and source some darkroom louvers.i am gonna make a start on the frame today..thanks irish traveller

 

[Irish_traveller]

soundproofing a cupboard..

soundproofing a cupboard..

hey icmag
i cleaned out an old cupboard and its 3x3x8ft and i thought
it would be great for a growroom.only thing is i can hear next door
talking ? so i am thinking would they hear the fans running..is there
any way i could soundproof the cupboard.i would make the room smaller say 2.5 x 2.5 x 8ft does anyone no if this could be done?
thanks irish traveller..

 

[Bmac1]

Im not sure about the soundproofing but a speed controller would help as the fan doesnt need to be humming at full bore. Another consideration is a bigger fan turned down will will move the same air and be more quiet than a small fan maxed out.

 

[Irish_traveller]

Thanks Bmac1 i will try it out..

 

[hoss1111]

I have a 2x2x4 cab 250w cmh and a s&p silent 150 fan on low.

I also scrog and use a giant 27 gal container of organic soil

Use insulation from home builders store. Not sure what one, but some are rated for sound too it's on of the name brand companies. I have had people in the same room as my cab and no one noticed.

Good luck