Hi PD
What size is the room? is it connected to the house?
You need it all mylar and I'm not a co2 expert but airtight? nothing around me is airtight LOL You need 2 rooms in that room a flower room and a veg room, if possible bring water into the room.
Cool so a 10x12 flower room. Green how many lights?
I would put a 1000 hps over every 4x4 area....
or a LEC...over every 3x3 area...
co2..how will you be getting it.....tank....homemade rig...etc...??
you don't neccecariarly need an airtight room.....using whole room or will you be using a tent inside of room....
..........
your going to play hard getting that room air tight....using whole room or tent