Help me design my bloom room!!

Finally in a position that will allow for ample expansion. Currently using a tent with a 1k in there. Any constructive criticism/assistance is greatly appreciated as there must be numerous things I haven't accounted for. Hoping to build up to the following:

2 sealed bloom rooms to allow for CO2 enrichment

-not sure if tanks or burners as I've never added CO2, leaning towards tanks.
-dehumidifiers will be introduced as necessary
-not sure what size a/c yet

8 – 1000w lights an Air Cooled Hoods, 4 in each bloom room

-Powered by 4 solis-tek matrix ballasts w/flip box all connected to a Titan 8 light controller w/dual trigger cords. I only need a 4 light controller but figured I'd pay an extra $50 for double the outlets to allow for future expansion.

Two 4 plant RDWC systems/room so a total of 8 plants/bloom room.
I was thinking of putting reservoirs outside of the bloom room by running the piping through the wall and sealing it around the hole. Or should I put them inside the bloom room?

What size fan should I use to vent the heat from 4 hoods?
Should I vent out of the roof (in garage)?
Since you don't run CO2 the last couple weeks of flower (I've been told) once its shut off how do you exchange air?
Should I have an exhaust system in place for the last two weeks in each room?
Suggestions on room sizes?


This room will most likely be located in the garage. I'm thinking of essentially having half sealed off with a separate entrance and using this space for the rooms. If not obvious already, I've never designed anything of this nature or even remotely close. Therefore feedback is highly appreciated and encouraged as well as any questions that may provide useful insight.

Too many questions, but to answer one............

Should I vent out of the roof (in garage)?

Hell yes vent outside. Otherwise it will get extremely hot fast and cause a bunch of issues (cooling issues, mold issues, condensation etc.)

- Jiji

no don't vent. co2 will just go outside.

ok I am an experienced grower set up in a garage in a desert! I know plenty of factors..

right now im set up in a garage, i chose the cheaper easier way, I got a 7x7x7 tent with
a carbon scrubber/ducting set up to a 1000 watt air cooled hood connected to a booster fan out into my garage..
since I live in the desert I have added a co2 tank and regulator and have that connected to a atlas ppm meter..
I have a swamp cooler sucking air from outside using ducting connected to my passive air vent in my garage..it allows the room to cool yet brings in co2 in to the garage, sometimes I crack my garage door open about 4 inch's so stale air can escape..that also works.

I would just get one big tent for flower...and run the 4 lights in one tent it should be enough for at least 4 dwc systems and plenty plants..
I would use a 1000 cfm fan with a duct splitter to cool the lights and vent fresh in...and a 600 cfm with splitter to exhaust..in a garage you want to control both environments...if the garage air isn't cool it wont cool your lights which will heat the tent and render the fans useless..you always want to exhaust but if you do you want it on a timer timed to work with your co2 enrichment.

kinda like this

datboytrue said:

ok I am an experienced grower set up in a garage in a desert! I know plenty of factors..

right now im set up in a garage, i chose the cheaper easier way, I got a 7x7x7 tent with
a carbon scrubber/ducting set up to a 1000 watt air cooled hood connected to a booster fan out into my garage..
since I live in the desert I have added a co2 tank and regulator and have that connected to a atlas ppm meter..
I have a swamp cooler sucking air from outside using ducting connected to my passive air vent in my garage..it allows the room to cool yet brings in co2 in to the garage, sometimes I crack my garage door open about 4 inch's so stale air can escape..that also works.

I would just get one big tent for flower...and run the 4 lights in one tent it should be enough for at least 4 dwc systems and plenty plants..
I would use a 1000 cfm fan with a duct splitter to cool the lights and vent fresh in...and a 600 cfm with splitter to exhaust..in a garage you want to control both environments...if the garage air isn't cool it wont cool your lights which will heat the tent and render the fans useless..you always want to exhaust but if you do you want it on a timer timed to work with your co2 enrichment.

Click to expand...

Thanks for the response really appreciate it. Have you liked using the tents? It would be much cheaper and easier. I was worried about the fact that tents aren't perfectly sealed though thinking it may waste co2? Also any issues with using tents you've encountered? I was hoping to make rooms also because it would add a couple feet of height

no major issues, every room will leak, the good thing about my atlas is as soon as my room drops under 1300 ppm it kicks in and brings it back to where it needs to be at, yea it leaks but also, co2 depletes regardless..its more like dosing your plants rather then keeping them in a co2 enviornment.. Look into secret jarden...they make bomb tents so does gorilla I've never liked cutting holes in my walls or exhausting in a obvious manner...tents just make the grow better due to the fact that its almost 100 percent controlled. Try it out

they even make adjustable height tents, hella cool

datboytrue said:

no major issues, every room will leak, the good thing about my atlas is as soon as my room drops under 1300 ppm it kicks in and brings it back to where it needs to be at, yea it leaks but also, co2 depletes regardless..its more like dosing your plants rather then keeping them in a co2 enviornment.. Look into secret jarden...they make bomb tents so does gorilla I've never liked cutting holes in my walls or exhausting in a obvious manner...tents just make the grow better due to the fact that its almost 100 percent controlled. Try it out

Click to expand...

Yeah I'll definitely start looking into like some 10x10 tents. From what I'm seeing 4k with magnum hoods should serve me well.

a mongo frog said:

no don't vent. co2 will just go outside.

Click to expand...

Rekoj is using air cooled hoods. Intake outside of the room and vent outside.

I've seen a ton of grows, only some of the shitty ones I've seen used CO2. The best growers I've seen don't use it. Personally I don't use CO2, FWIW.

- Jiji

yeah co2 can ruin a good crop if not monitored right. Hepa filter and fresh air from outside is the best, unless its 108 outside, but I flower at night anyways. 9pm -9am, sun down to sun up. my 6.5x6.5x6.5 tent is perfect for a 15 plant grow with 2 600w HPS