temp question

[permat]

So I'm having a issue getting it dialed in just right, I have 2 1000w cooltube enclosed lights cooled by a 6inch inline 440 cfm fan.

Also have a separate 6inch fan 440 fan and the tent cooled and air cleaned by this.

Currently my temp out of cirect light is between 72-75 but the direct light temp is closer to 90 HELP!

 

[TruenoAE86coupe]

You need to make sure you have fans in the tent making all air the same temp.
Never get a temp reading from directly in the light, it just confuses the thermometer. Make sure you have good air flow to all corners of the room, and an ocsillating fan between the light and canopy.
How big of an area is this?
FYI for cooling my 2 1000 watts (1 cooled 1 not) i use 1500cfm, pulling from the room, through the filter, light and out of the room.

 

[permat]

I have a 4x8x8 tent.. I have a fan just to pull air from a cool air source to outside and then have a another fan to vent the room and through a filter.

I also have ocsillating fans inside the tent for air flow, I have 3 thermometer 1 in top corner, 1 at plant level and 1 on floor of tent, currently 73 on top of tent, 94 at plant base level and 88 on floor

 

[cannofbliss]

you have what i would call a "hot-pocket" lol for sure just not the kind you can munch on

the answer is simple my friend... and its blowin in the wind of your tent

sorry those last two comments are completely stoner related haha..

hot air rises and cold air sinks if you got fans at the top they need to be pointing along the sides as this will cause the circulatory effect you need to have even temps throughout your tent

 

[permat]

you have what i would call a "hot-pocket" lol for sure just not the kind you can munch on

the answer is simple my friend... and its blowin in the wind of your tent

sorry those last two comments are completely stoner related haha..

hot air rises and cold air sinks if you got fans at the top they need to be pointing along the sides as this will cause the circulatory effect you need to have even temps throughout your tent

Should I be sucking air from top or the bottom?

I have tried both ways but neither seems to change the fact that the direct light temp is outrageous.

 

[TruenoAE86coupe]

Should I be sucking air from top or the bottom?

I have tried both ways but neither seems to change the fact that the direct light temp is outrageous.

Thermometers directly in the light will give inaccurate readings, they are always supposed to be placed out of direct sunlight, and 2000 watts is pretty damn close. Put 1 thermometer at the middle height of the tent or a little higher to get it directly out of the light path, and use only the one. It will be accurate enough to make sure the plants are happy.
Again when running this kind of wattage a fan blowing between the lights and canopy goes a long ways, i highly recommend it to anyone pushing this kind of power.

 

[permat]

Ok I have placed one in middle of tent its running at 73-77 and humidity of 35 flowering and now have some curling downward leaves, and yellow spots. FML

 

[cannofbliss]

your humidity of 35% shouldnt be too much of an issue and you dont want high humidity during flowering you'll get bud rot that way ... anywhere around 30-40% is just fine and dandy and if you have on the lower end of the humidity range during the last couple of weeks your buds will create more of the yummy resin to keep the plant from "drying out" so it can desperately make itself as sticky as possible in hopes to catch any pollen floating in the air and when she gets no pollen and low humidity its like really "teasing her and making her that much more wet LOL"

those huge ass lights are what is zapping the humidity out of the air and that is Normal your temps are spot on and perfect

just add a warm mist humidifier to go on for 15 mins every 4hr intervals a cheap one will raise it in an enclosed environment by at least 10% that should put you at around 40% but you can experiment and find something that will keep it more constant... and the warm mist will raise temps only a couple of degrees... a good cheap one is the vicks vapor mist thingy at walmart like 15 bucks should do the trick...

also if you think about it plants that grow outside in the sun have a constant varying temps and humidity levels and they seem to do just fine...

so dont sweat it too much

 

[cannofbliss]

Should I be sucking air from top or the bottom?

I have tried both ways but neither seems to change the fact that the direct light temp is outrageous.

ahhh... to push or to pull that is the question...

well here it goes when you force air out of an enclosed space you are creating a vacuum inside the tent so essentially you should be expelling as in pushing hot air out of your tent and pulling in cold air...

have the fans "suck the hot air" facing in a way to (push) out the air from the lights kinda like what trueno said and out of the tent from the top this takes the hot air out....

now even without a secondary cooling fan running this will create the vacuum effect quite nicely and this will draw in air into your tent even without a secondary fan but you want the secondary "cool air" fan to be of either the same cfm of the hot air fan going out of the tent or lower otherwise the vacuum effect wont work...

the secondary fan or opening in your tent should be pulling cold air in from the bottom...

so hot air out of the top and cool air from the bottom

hope this helps... and by the looks of your temps anyways they seem fine and you should normally anyways get a reading of 5-10 degrees hotter directly below the center of the light fixture or bulb anyways... and this is always going to be the case unless you force air conditioned air that is compressed with freon to give you 40 degree air blowing through your cool tube and who the heck wants to spend a couple of grand on a cooler to do that and raise the elec bill to boot also

 

[Thedillestpickle]

haha venting your cool tube with AC air? thats pretty extreme. You dont want your intake fan to be equal in CFM as your exhaust. If your exhaust has to push through an air filter and cool-tube it wont keep up with the intake fan and youll have the opposite of a vacuum... basically your house will start to smell of weed from the unfiltered air being pushed out any leaks in your tent. you dont really need an intake fan but if you use one make sure its not as strong as your exhaust

 

[cannofbliss]

haha venting your cool tube with AC air? thats pretty extreme.

yeah i know was being a bit facetious and just kiddin around lol but it is done in some commercial co-ops for large dispensaries/pharmacies and is actually cheaper to keep the tubes and lights cooler than the entire room still expensive though

You dont want your intake fan to be equal in CFM as your exhaust. If your exhaust has to push through an air filter and cool-tube it wont keep up with the intake fan and youll have the opposite of a vacuum... basically your house will start to smell of weed from the unfiltered air being pushed out any leaks in your tent. you dont really need an intake fan but if you use one make sure its not as strong as your exhaust

you are absolutely correct... if he has to push through a thick filter or carbon scrubber etc... you dont want the same cfm... you will def loose pushing power of the hot air out fan and lose the vacuum effect...

i just mentioned it as the same or lower because he never mentioned anything about a filter... but i guess i didnt read too clearly and was a bit starry-eyed earlier to catch that lol...

i see now that he used the word "cleaned" guess i missed that part... lol haha

thanks good catch dillestpickle...

yeah if you have a filter and dont want the place to reek of weed in about an hour lol ... then you'll want to get yourself at least a 1000 cfm fan for exhausting the hot air and if necessary to have an intake of cold air... you can take the inline 440 you have that your using for exhaust and use it for intake of cool air...

 

[permat]

Ok so guess I'm a bit confussed here.

The way I have hooked up now and seems to be working is.

a 440 cfm fan with a outside source intake to cooltubes to fan sucking to attic.

and

a 440 sucking air out of the tent and through a filter in attaic.

I have multi vents at bottom of tent open allow air to come in and a 2 house fans inside the tent to keep it flowing.

 

[cannofbliss]

Ok so guess I'm a bit confussed here.

The way I have hooked up now and seems to be working is.

a 440 cfm fan with a outside source intake to cooltubes to fan sucking to attic.

hey... if it works then great...

just make sure your attic isnt gettin moldy from the moisture every now and then... but you shouldnt have to worry bout that if its not really humid in the first place