New Growroom sketch up - need you opinion & advise -

[erwingruber]

Bellow you can find one ugly sketch of my thoughts.

The limitations is
1) AC is a must outside temps 100+
No Window AC's available on the market
I was searching 3 days for dual hose portable AC's with no luck
Split AC's available
2) I cannot use CO2 & sield room
ppm controlers out of my budget
i am still trying to manage nutes so i think i need some exrperience to use co2



I was thinking running fans 24/0 do you think that i will have temp
issues as th A/C will not manage to cool the rooms

Do you think that it is better to run fans 3 mins off 1 min on (and what about heat build up in flower room)

Any thoughts for a setup that the AC runs in the flower room(maybe with one extracarbon filter recirculating flower room air ??)

Is there any cheap ways to manage co2 ppms if i decide to try sield room

Do you think that one 360 m3/h fan pushing through lights is enough
I would like to hear you thoughts or your improvments especialy on airflow
and cooling down the rooms.

The grow it is going to run ebb&flow tables
for start and maybe some dwc buckets later

the build out starts in 3 weeks

 

[Cookie monster]

I think the passive intakes wont do it tbh, you might want to think about a fan pumping in fresh air.

Also looking at the diagram you ave the fan pulling the air through the carbon filter, i dont use them myself but should the fan not be pushing the air through it?

 

[touchofgrey]

It looks like you are pretty close on the air quantities.

You can figure the light cooling load from the formula CFM = 3.16*Watts/deltaT. So in your case with 1600 watts and lets say a 10 degree temp rise, you would need 500 cfm (850 M3/hr). Actually I usually would figure a 20 degree rise for lights so you could probably cut that down quite a bit. I think however the Y's in your layout will be a problem to get even airflow.

But for the plant rooms, you really only need to figure 1/2 to 1 air change per minute. Your veg room is 225 cubic feet and your flowering room is 275 cubic feet so between 250-500 cfm (425-850 m3/h) is plenty to ventilate both the rooms.

I don't see why passive intakes would not work as long as you made them big enough. And carbon filters don't care if you push or pull air through them, most people pull like you have drawn.

A couple of good ventilation threads
http://www.icmag.com/ic/showthread.php?t=112862
https://www.icmag.com/ic/showthread.php?t=100823

I don't do AC but Hoosierdaddy has a good thread on that too
http://www.icmag.com/ic/showthread.php?t=95491

 

[erwingruber]

Cookie monster :
Thanks for passing by , as i read in Ventilation 101 passive intakes is ok if the size is enough not to restrict airflow , so 2 big passive intakes is ok.
as for the c.filters i read that they work both ways but better draw air from the filter.

ouchofgrey :
You have a point on the Y splitters , maybe i will put the 400MH + one 600hps inline in one fan and the other 600hps on a second fan.
for the flower and veg room i need low air exchanges to help AC keep room cool , it is easy for me to buy bigger fans but i think that this
will kill my AC , The threads are very informative i have spot them too.Thanks for helping me here

 

[Scrogerman]

Change your Ducting plan!

Change your Ducting plan!

Hey Buddy!
Yeah its a really good idea to read & learn the 'Ventilation Thread - 101' , Its also great as a reference, Great Start Man!, everything you need to learn & more!
Your right on the Carbon filters, you can run them both ways as far as i am aware, just make sure you rate your Carbon'Filter With a larger output than the Exhaust Fan! I have made this mistake(thanks to the dumb-ass staff at Growell Dudley, they are pretty much all thick-heads imvho! Why employ clueless people?, it's beyond me!) 'Back to the point sorry- So for instance/ie - i would run a 400cfm rated Carbon'Filter to match a 360cfm Exhaust fan! dont do this any other way or think you may get away with it like i did, then you got people asking what the funny smell is around the place! Always make sure your Carbon-Filter is slightly bigger than your Outake Fans output.
#The general 'Rule of Thumb' for passive intake is, it needs to be at least twice (x2) the size of your outake, for example; Exhaust Fan = 6" outake diameter, so you would need to use or insert 12" of passive intake, at least but not less than twice/x2 the outake.
Moving on to your A/C(aircooled) Lighting/Hoods, yeah i'm pretty sure you could redesign your ducting plan bro, try snaking it around front to back rather than using 'Y's' like you are trying to do, doing it that way you will need to use Duct- Dampers to 'Equalise' airflow & they aint cheap either & in your case the duct plan can be rearranged like i have advised. I could draw it for you but im pretty sure you will get it,(Snakeing the ducting around front to back rather than using 'Y's). This way you will have a more equal flow of air & wont need to use Duct'Dampers. Air will always follow the path of least resistence so dampers are used to equlise this effect.
Just looking at your plan there, im thinking it would be a real good idea to vent into your attic rather than straight outside, the grill/vent covers have to be put in on external walls etc which causes unnessesary feedback - makes your exhaust fan less efficient etc. & in general shit like that just pisses me off, points of heat like that are a little dodgy imo too-Paranoia'Paranoia,helicopters,helicopters lol! The heat from ducts exiting your property is much better hidden in an attic space where heating ducts for the house(or chimney's etc) naturally inhabbit, so all looks cool, little things like this are very important imvho!
There are a few alterations that may be of benefit to your blueprint/plan too, like the A/C (airconditioning)would be better placed in your flower Cab where Temps & overall enviroment are more critical. I'll have to keep an eye on how your getting along on this one buddy! I wish you the best of luck with your project & hope i have helped some, if you need a fast opinion anytime, just give us a shout buddy!
Peace & G'Luck........................Scroger! blueprint/

 

[erwingruber]

Scrogerman :
Thanks for helping me here ,
I have read part of the veltilation post (5-6 pages) soon i will complete it
Carbon filter is actualy 800m3\h and fan 750m3\h so i think i am ok.
Ducting is going to be redisigned and i think snake is my first step and if i have issues on the last
600 Hps i will put a seperate small fan for cool down alone.
No attic available .

Thanks again for the help and the snake idea , what do you think about AC efficiency do you
think that a 8.000 AC can cool down the rooms even with 110+ outside temps or i run it to waist.

Yes,Keep an eye on me i have limited time (3 weeks) and i must fix my setup and go shoping.

 

[gdbud]

I think however the Y's in your layout will be a problem to get even airflow.

If you install a damper in the shortest run of the two 600 watt lights then you can adjust the air flow through both lights, But every time you move one of the lights up or down you might need to readjust the damper. To accomplish this I would place a remote temperature sensor in each ducts down stream of the light and adjust the damper so that both sensors read close to the same temperature.