How to beat very high outside temps ??? (100+F ot 40+ over Celsius)

[erwingruber]

Next week i will start to build a grow room ,
the summer is coming and here outside temps
easy hit the 100+F or 40+ Celsius mark.

I will have a dedicated room 20' X 10' (6x3 meters) as my playground
Flower Room dimensions 8'x4'x7' or 240cm x 120cm x 200cm
Veg Room 4'x4'x7' or 120cm x 120cm x 200cm

The Flower Room (ebb&flow) will start with 1 or 2 x 600 hps for the first run but
finally they r going to run 3 x 600 HPS in there.
For Veg i am going to run some neon fixtures and maybe a 400 MH.

I was thinking to build the two rooms with wood frame and some sheeting
or maybe just buy two Secret Jardin Tents
(Darkroom series) , 240*120*200 for flower room
and 120*120*200 for the veg room.

I was thinking to vent each room/tent seperatly outside and
have some passive intake from oustide for aircirculation.

In the flower room the 600 watters will be cooled with a seperate
fan with fresh air from outside and vent the hot air outside the room too

I am still thinking a way to beat the high summer temps and how i am going
to setup the A/C unit . It is sure that both veg and Flower room going to need
help maintain the correct temps.

One way that i am thinking is to use a portable a/c unit in the room , somehow
i am going to catch the cold air and with a Y splitter send the cold air in the
tents , i don't now if this is going to work cause of the exaust fans ....need some
help and ideas here i Think .

Here is what i am thinking for the Y splitter

maybe sealed rooms is a better option
but i'am not ready to deal with CO2 supplement.

 

[erwingruber]

Come on guys , give me a hand here can i have exaust and intake in my room or this will eliminate my A/C ??

 

[NiteTiger]

First off, some questions and comments.

Is this room inside a house? Or in a poorly insulated shed, or something to that effect?

If you're in a house, does it have central heat and air?

What are the current temperatures in the room as compared to the outside temperatures?

Does the room have any windows?

I didn't see you mention odor control, what are you using?

What size fans are you using?

Comments:

400w is a bit small for a 4x4 area. You want to maintain 50+ watts per square foot for vigorous growth. 4x4 is the recommended size for a 1kw. It will work with a 400, but it will work much better with a 1k. If getting a new light is an issue, try reducing the size of the veg with panda poly.

Neon is no good for grow purposes, ditch it. Hopefully you meant fluorescent?

Yes, you can use A/C without having a sealed room.

In your situation, if the room has a window, put a window A/C in the room, and exhaust hot air out to where ever, just not back into the room. Now your all of your intakes are pulling in nice cool air, without needing to duct in a portable A/C, which suck in general, by the way

Welcome to IC

 

[whatissixbynine]

.

 

[erwingruber]

Searching around i found some usefull post about my issue and i have a lot of reading ...

https://www.icmag.com/ic/showthread.php?p=3287588&posted=1#post3287588
http://www.icmag.com/ic/showthread.php?t=126484

The growrooms is inside a speare bedroom in a house without central heat or anytype of A/C

The bedroom rises temps near 100+ when outside is 110+

i have two large windows in the bedroom

For odor control i use a carbon filter with a 2000cfm / fan on speed controller from the growrooms outside the bedroom
and intake from outside the bedroom too.

The 400W is for raising some clones and 1 or 2 moms , i have some unused space for expansion.

The neon is for new clones (2 weeks) I try them on some seedlings for about 20 days and it was fantastic , maybe it is a florocent type , check them out

http://www.hydroponics.eu/product.asp?Id=1242-NeOn-KIT+Grolux+6400+lumens+(60cm)

Your suggestion as i understand is to cool the bedroom
and draw intake air from inside the bedroom ?
-- And the bedroom from where i gets air

Thnks for helping

 

[manitu]

Those "neon" lights are in fact 55w PL-L fluorecent's. 4 of them to be exact. GREAT lights for veg.

.manitu

 

[erwingruber]

Yes those Neon made great work .
Here it is a sketch to help you help me with my A/C issues

 

[NiteTiger]

Gotcha

Ok, for your setup, pull those intakes out of the window, and put in window A/C. Then pull your intake from the inside the room. That way you're pulling cool air conditioned air in, instead of hot outdoor air. You'd basically be making the bedroom a giant plenum.

Remember, no amount of airflow will cool the room below the temperature of the intake air.

 

[erwingruber]

NiteTiger:

Window A/C's is not available over here but i can make it with a mini split A/C too.
I think that i will raise the electrical cost to much for cooling down all the bedroom and i will not have easy control to my flower room temps

I read your sugestions on other posts too and i think i have these 2 more ortions

1) Try a 2 hose portable AC inside the flower room with low exaust fan speeds and intake and exaust of the AC outside the bedroom.

2) Try a 1 hose portable AC inside the flower room with low exaust fan speeds and exaust
outside the bedroom
In this second case i must deal with a small odor leak
1) but a carbon filter and a fan run inside the flower room recirvulating air an eliminate odor

OR (can i do this ??) put a carbon filter to the portable AC exaust

I know that portable sucks but it is portable

 

[NiteTiger]

Whoa, no window A/Cs available?! I've never ever run into that!

Without compromising your security, can you give us an idea where you are?

Wait, am I just reading this wrong? They're available, you just can't get them to your location easily or without raising eyebrows?

I'm imaging a country that has banned window A/C units.

As to your other question, I'd dump the excess heat into the room, then exhaust that room through a carbon scrubber. I wouldn't try to inline a scrubber to the A/C, seems more complicated than it needs to be, and I'm not sure if that would have a negative effect on the A/C.

 

[Andyo]

same situation in thailand =34c now

same situation in thailand =34c now

I have same thing heat wise and we have humidity 8o% + but humidity can work in my favour,my room is 6.5 mtrs x 5mtrs ive slit it into a 2kw and a 4 kw room the 2 kw is the mothers veg it has air con ducted via and insulated pipe 8'' inline duct fan and is mixed with outside air coming in but is conected to a room themostat becauase night temps are 20-23c outside itis switching on about 9am.the room runs lights on 7pm off 1pm.8' inline xpelair out

so i run the 4kw room 7pm until 7am its ok without a/c 2x 8'xpelair out drawing through the lights that are not sealed and 2x8"xpelair in ,i have big ozone lamps in the out solid duct they exhaust 4th floor up on the roof my room is 3rd floor.i own the biulding
humidity in a large room can be used for cooling with max air in and out and fans blowing the air around it evaporates and cools not massivley but it drops the temps a couple of deg .still fine tuning at the moment .A

 

[erwingruber]

NiteTiger :

No window AC units are not banned but they are not in the market everyone uses mini split AC's ... maybe one in every room .
As for the exaust of the 1 hose AC i think that you have a point , it is a safe way that will work , Thanks a lot helping me with that !!

Andyo :
Your setup sounds intresting , but i read it 3 times and i do not understand the
big picture , give us a clear detailed description.

 

[NiteTiger]

NiteTiger :

No window AC units are not banned but they are not in the market everyone uses mini split AC's ... maybe one in every room .
As for the exaust of the 1 hose AC i think that you have a point , it is a safe way that will work , Thanks a lot helping me with that !!

Ah, gotcha!

They're just not the top dog in your area, everything is more to splits. Okay, that makes sense. I was wracking my brain trying to figure out why a country would ban window a/cs

 

[manitu]

Can you draw air from the cellar or crawlspace? It will save you some $ in electricity. Then you won't have the intake and exhaust in the same window.

.manitu