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tint I have a 3.5k split air con in the room, I also use a humidifier. My room is fully sealed except for the inlet and exhaust fans which have spring loaded flaps. It is possible there is lose due to convection and air is passing the spring loaded flaps, I could try installing a motorized flap...

thanks tint . given thats 360hrs of running your getting approx 18hr/ lb of co2 at 1000ppm.for a 256cf room im getting 126hrs ....6.3hr/lb of co2 at 1200ppm for a 370cfm room with the exhaust running at 6% I also got 126hrs... 12.6hr/lb of co2 at 1200ppm with it fully sealed. Considering mine...

i already used the calculator and as I dont know what my flow rate is, so it doesnt help. I put in 5cf/hr and was told it should last 35hrs

i have a controller with fuzzy logic

hi, I'm currently setting up co2 in my grow room for the first time, I'm using a controller, a reg and a co2 bottle. Well my 20lb bottle lasted 126hrs. Which seems incorrect. The room is sealed I read on here in one of the posts, to slightly ventilate the room as it sucks the heat from the...