I have grown outdoors quite a bit but never indoor due to renting then kids. Now I own my house and kids are raised. So I turned a upstairs room with cathedral ceiling into a reflective chamber to say the least. I took the room and split in two at the peak of the roof 6'3" from floor to peak, floor dimension 6×6 but with cathedral ceiling it's only 47" on the low end. I sealed it air tight, lots of silicone, sealed the door with some camper seals and door seal strip and used wing nuts to firm it up for air tight seal. Put an outside layer of 3 mill plastic to seal it up then put r11 insulation in, then another layer of plastic over that, then put furring strips on the inside 4' apart and put 3/4 inch foam in between them again another layer of plastic then 94% reflective insulation stuff looks like bubble wrap with foil on it extremely strong stuff comes on a 4x25 foot roll. Covered every thing floor ceiling even backside of door ect. Lots of that foil tape shit $$$$ probably 1000' didnt want it to suck off the walls by my exhast fan. Which is a 210cfm 4" inline vented staight up through the roof with a nice clean look on outside at the highest point right by my 1800w led 385 actual wattage so it sucks the heat right out. Also decided to put 480 watts of cfls 4 40w and 15 23w all actual not equivalent so it helps get through to the lower branches. Intake comes from outside about a 5 foot run comes in at the bottom opposite of the exhaust and a passive intake coming from downstairs bedroom. Intake fan same as exhaust both on speed controllers but I leave themboth on balls to wall 24/7 and still pulls from passive vent. Outside line coming in goes into a modified cooler and out to tent so I can put frozen gallons of water in it to help cool when ac isn't needed same on passive all air tight suction makes it hard to open with the seal I used. Cooler also has a line going from lid to ac in the window outside grow room cooler mixes cool ac air with fresh outside air. I have ac thermostat on inside of grow room ac is outside of grow room. Humidifier inside dehumidifier on outside (40 liter)right in front of ac so when dehumidifier kicks on it blows dry air into ac intake I can lower humidity in minutes from 60 to 38 and if it's humid outside I close off the outside line and let it pull more ac air and air from passive vent. Line going from ac to cooler is about 8' and attached with a register boot to ac leaving about 4 inch of ac exhaust to go into the room to keep it cool too but the rest gets sucked into the cooler then grow room. Let's see what happens if anybody looks or not? Then I will update more details already 43 days in on 3 auto one femished photoperiod. Battery is almost dead. Tokintoe out