NEED!!! YOUR GROWROOMS Air Flow Specs for my FAQ!!!

Billj500 said:

This is really great info. I'm gearing up for my first grow in the next few weeks and don't know anything. But I do have a friend that has grown a couple times (so he claims) who suggested all I needed for co2 injection was a tank, regulator and some rubber tubing. I guess After attaching the rubber tubing to the regulator and poking small sprinkler holes in the tubing, you route tubing on the ceiling above the tables and just let the co2 fall down on the plants. He says I don't need a controller or generator unless I want to get fancy. So, this is misinformation?

Also, I have another question not related to Co2 but just basic ventilation/heat/lights. I will be growing from Oct-Dec. Since I live in the mountains where the winter temps stay pretty cool, especially at night, will I even need A/C for my hoods in a modestly insulated garage? I was thinking no which is why i was looking at the hydrofarm daystar NON a/c. What do you guys think?

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That will work, but you will never know the levels, so repeatability can be a challenge.
Well sorta. A regulator adjusts pressure. It does nothing for volume of gas. A flow meter regulates the amount of gas entering the room.

Now with that said, how do you know how much you are putting into the room? Sure there is the calc in a sticky here. But that doesn't count for the amount the plant(s) can turn over. Or leaks in the room. So you don't know what you are adding. No ppm measurements, use the yeast or vinegar, because you will never overdose the plants.

Also missing is a way to turn it on and off, add in a solenoid valve.
So its a
regulator (so you don't dump 800-1000PSI into the flowmeter)
Flow meter
Solenoid valve
ppm meter that can control the solenoid valve

This is a closed loop system.
without the ppm meter/controler its open loop (aka:best guess)

As for the AC part, I'm thinking a heater may be more needed. Once those lights go out it may get chilly.
Rule of thumb is a 15F drop is ok from lights on to lights off.
(that if you are in the northern hemisphere of course)

BigBudBalls said:

That will work, but you will never know the levels, so repeatability can be a challenge.
Well sorta. A regulator adjusts pressure. It does nothing for volume of gas. A flow meter regulates the amount of gas entering the room.

Now with that said, how do you know how much you are putting into the room? Sure there is the calc in a sticky here. But that doesn't count for the amount the plant(s) can turn over. Or leaks in the room. So you don't know what you are adding. No ppm measurements, use the yeast or vinegar, because you will never overdose the plants.

Also missing is a way to turn it on and off, add in a solenoid valve.
So its a
regulator (so you don't dump 800-1000PSI into the flowmeter)
Flow meter
Solenoid valve
ppm meter that can control the solenoid valve

This is a closed loop system.
without the ppm meter/controler its open loop (aka:best guess)

Click to expand...

Thanks for the info. I think I will keep it simple for this first grow and just research the yeast or vinegar system and maybe use that method.

BigBudBalls said:

As for the AC part, I'm thinking a heater may be more needed. Once those lights go out it may get chilly.
Rule of thumb is a 15F drop is ok from lights on to lights off.
(that if you are in the northern hemisphere of course)

Click to expand...

I was thinking the same thing. The garage is actually heated from the house by way of forced air. Will forced gas heating hurt my plants? Will the air that comes in through this heat vent be enough air for my "in" vent? Or do I need fresh air from the outside? Thanks for your insight!

1, Hood Type, = Closed
2, Light Wattage (total), = 1000whps/216wt5
3, A/C, = no
4, Exhaust Fan 1 CFM, = 747
5, Exhaust Fan 1 mode, = Constant
6, Exhaust Fan 2 CFM, =170
7, Exhaust Fan 2 mode, = Timed connected to hps hood
8, Exhaust Filter (if yes give flow resistance rating or a short description), = no
9, Area size 1, =10x12 960cf
10, Area Size 2, =7ftx2.5ft closet
11, Co2, = no
12, ADD YOUR OWN, = large exhaust above hood intake hole in floor

Hey 420 guy sorry for hijacking your thread w/Q's about my grow room air flow setup. I just realized it was kind of distracting the goal of the thread. My apologies.

First off thank you and + Rep to ganjagoddess & rezo for your specs

Billj500 said:

Hey 420 guy sorry for hijacking your thread w/Q's about my grow room air flow setup. I just realized it was kind of distracting the goal of the thread. My apologies.

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Not At All Please Chat away ALL you like, keeps the thread up top =)

Try and keep it about the air in your room and we will end up with a very good resource for setting up a new grow rooms air handling systems.