c02 room layout question

[gbis59ll]

4 x 600 hps,

now i can have the air cooled hoods drawing exhausting the hot air out of the hoods from another room ( Big hassle if you ask me )

or i can just simply have a timer and stop the exhaust/out take and have the c02 tank kick on, will take 20minutes to get to 1500ppm i believe, 80sq ft room,

and have the fans off for a total of 1 hour to 2 hours so it can absorb the c02,

now is this enough time to justify the c02 use?

i mean im using a mini split, so theirs no fresh air whatso ever,

i dont want to have fresh air from the outside come in because it's always hot here 95+,

 

[Phillthy]

a burner in an 80sqft room (8x10) would reach 1500ppm in less than 2 minutes with a 2 burner gen. best bet is not to vent at all. seal it up and cool with an ac. if you have to vent then dont use co2. you wont notice enough to make it worth it.

 

[gbis59ll]

Ok so if i have air cooled hoods, the heat will just sit in their wont it?

i mean my ac is boss so it can cool it competly, but i planned to have the carbon scrubber hooked up at the end of the ducting for the hoods,

how else can i do this?

 

[Adrift]

i would just run the room sealed, so that you can burn your co2 with great effects....

run your cabon scrubber in your room with no duct off it, so that its self circulating basically... this will help your odor....


i dont know why your venting your hoods if your ac is good enough to handle the load????

elaborate more on this if ya dont mind...

 

[Phillthy]

yeah jsut suck through the filter and put the clean air right back into the room. filter, fan and nothing else, no duct work. i run 4 x 750 with air cool hoods. i took the glass off of them. i dont air cool them but run them open and let the ac do its thing. completely sealed room with co2 generator. completely sealed means less of a chance of smells escaping you can also maintain the co2 levels constant with lights on. no co2 when lights are off.

 

[Adrift]

^ could not have said it better my self!!!

 

[gbis59ll]

i never tried it that way, always ran vented hoods, im in Arizona so it gets hot here,

my mini split unit is 10,000 btu, you guy's sure it will work if i have the ac come on like 30 minutes before light's so it has plenty of cold air?

when your running c02 dont you want 80-90 temps anyway?

in a 100SQ ft room, building a wall to have a wall space/hang ballast, so the space will actually be 80sq ft,

so i will just recirculate the air in a scrubber, forget about all the ductwork with the lights,

now for the c02, at what flow setting should i have it on and how long for 80 cubic feet?

 

[Phillthy]

10k will be close but should work for you. rule of thumb is 3kbtu for every 1k of light.
i keep my ambient temps under 80. the canopy temp is higher.

best to get a ppm meter that will activate the genny or the tank when needed to maintain the levels. i use a cppm-1.

 

[gbis59ll]

so thats the aboslute best set up to use?

 

[Phillthy]

in the long run it will save you a lot of money. i go through about 4 -5 propane tanks a year.
thats like $100 to run co2 all year long.

 

[gbis59ll]

ok well my question is, i think it's stupid i have all these air cooled reflectors, and just to take off the glass and let that heat build up, i mean i understand that c02 is best in 80-90degree temps, but im in AZ, one of the hottest places in the world,

i think it would be better if i kept my hoods vented, but instead of pulling cool air out of the room and draining the c02,just have ducting going into my bedroom pulling cold air from the bedroom through the hoods to outside,

that way im not losing any c02 and technicaly it would be 100% sealed still, am i right or im i just a idiot?

 

[gbis59ll]

and i think i need to do it that way because my mini split unit doesnt start cooling down the room until it starts taking the Humidity out of the room,

so its about 20% humidity here,

and i know i need to go for a 50% range

 

[Phillthy]

well in that case what i would do is air cool the hoods but dont exhaust any air. so draw air in with a fan that pushes the air through the hoods and out the room. ac will keep the room cool and you can recirc with the carbon scrubber. this will keep any nasty odor from leaving the room, allow you to run co2, and air cool the hoods. by pushing through the lights you will not suck in any stinky air to be exhausted out of your room.

 

[Phillthy]

so you are not exchanging any air in the room. only air coming in goes through the hoods and out. your plants enjoy the cooler temps and co2. your co2 wont leak out the exhaust and neither will any smells. you should be good to go.

 

[gbis59ll]

well in that case what i would do is air cool the hoods but dont exhaust any air. so draw air in with a fan that pushes the air through the hoods and out the room. ac will keep the room cool and you can recirc with the carbon scrubber. this will keep any nasty odor from leaving the room, allow you to run co2, and air cool the hoods. by pushing through the lights you will not suck in any stinky air to be exhausted out of your room.

so what your saying is basicaly Pull the air through the hoods(from my bedroom) and out the growroom?

 

[Phillthy]

intake - wall - fan -- hood -- hood -- wall - exhaust

you want the fan before the hoods and push the air through them.

basically you would have a sealed room with air cooled hoods. the air cooling the hoods does not interact with the air in the room.

 

[gbis59ll]

ok so i was right, thanks

 

[Phillthy]

its good to tape the hoods so they are sealed more as well.

 

[gbis59ll]

i decided on a natrual gas generator, for really cheap c02,

can someone link a decent one?

 

[Wise]

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