For anyone interested, this is the "low down" on my room.
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To start off,
The "shell" is built with 1/2 inch osb, a type of plywood, and 2x4s. I just used the dimensions of 4x8 for ease of use, thats how the plywood comes and no need to make cuts unless your fine fitting on an uneaven surface.
Shell partly built,, This is a good time to cut the doors and figure all that out.
Air for lights.
Figure out how you want your lights before hand and cut holes for ducting in the right place the first time.
The air for my lights is totally separate from the air inside my room.
The extraction fans for my lights are mounted inside my room.
Its best to keep straight lines with your ducting to increase the efficiency of the "
suction" of the heat out of your light system.
If you can afford it put simple elbows on all bends in ducting.
IMO its best to set your extraction fan to suck the hot air out and ditch it out the other end.
I use 6 inch ducting even for my 1ks, its fine if you only have a few big lights. For larger systems with 5+ lights Id go with 8 inch.
So now I gotta cool the room without extracting air inside the room (co2).
Thats either
a portable ac (the right kind.) Im not familiar with them.
a window unit.
or a split unit ~~~
the best. but for bigger systems..
Now heat from the lights isnt an issue.
Its a good idea to insulate your room, even in the slightest way. All I use is 3/4 inch reflective insulation board bought from a home improvement store. I put this on the walls floor and ceiling.
I also caulk all joints 3-4 times over (before and after installing the insulation board). All doors have weather stripping foam on them to seal those spots up too.
I use the spray foam "greatstuff" to seal spots around the ac and 6 inch ducting along with any other big holes.
ok, got the lights and ducting and extraction fans set and sealed up nice eh? good job
that was quck
hehe
Also want a few ocilating fans in the mix, I know you know that but Im on a roll haha.
A dehumidifier is a must as well. I use a 25 pint on a auto drain.
Now,,,
Your room is sealed and bright and cool and dry all at the same time
but you need "fresh air" aka co2
Normal co2 levels in the atmosphere (depending on location) are around 450 ppm (parts per million) of co2. That is the max any conventional "in/out" room will achieve. This room can hold and stay at 1,500 ppm of co2 at all times of lights on. The co2 controller you buy determines how accurate your ppm levels will be though. My controller / monitor cost 700 us... It keeps the ppm within 20 points of my "set point" though... very precise and worth it.
You will also need a regulator for a co2 tank.. Burners are an necessary hazard for smaller set ups IMO.
NOW REMEMBER
Everything needs to be on point for co2 to do its magic! Perfect the enviroment and your root conditions (either it be soil or hydro) then co2 will be like nitrous to your little growing machine! vroooom vrooom
Your plants will also be able to process light faster so putting 75 w a sq foot isnt really a waste
maybe haha. You know my style
This also means they will eat more food and drink water faster so be prepared for that! but always be careful not to over feed
balance is key.
Thats pretty much my room besides the details on my hydro system
stanks
