Sicarii
05-25-2010, 03:13 PM
hey folks, i finally got my box built and light proofed. i don't quite know what i'm doing when it comes to ventilation however.
my cab's inner dimensions are 32x20x46inches (80x50x100cm) LxWxH, and it is running 300w of HPS in the form of 2 150w bulbs.22198 22199 22200
my problem:
1. I don't know what size fan to look for. In Lucas' post here, (https://www.cannabis-world.org/cw/showthread.php?t=360) he says that watts/4 is a proven ratio. If i have 300w of lights, would a 75 cfm fan really cut it? or should i use the cubic footage of my cab and use that to determine the cfm of a fan I should get.
2. I don't know how to place the fans in the cabinet. I was thinking of a double muffin fan exhaust, that would have one muffin fan pulling from the box into an inline carbon filter and one fan on the end of the filter assisting the first fan.
thanks in advance for help and advice
peace and love
sicarii
my cab's inner dimensions are 32x20x46inches (80x50x100cm) LxWxH, and it is running 300w of HPS in the form of 2 150w bulbs.22198 22199 22200
my problem:
1. I don't know what size fan to look for. In Lucas' post here, (https://www.cannabis-world.org/cw/showthread.php?t=360) he says that watts/4 is a proven ratio. If i have 300w of lights, would a 75 cfm fan really cut it? or should i use the cubic footage of my cab and use that to determine the cfm of a fan I should get.
2. I don't know how to place the fans in the cabinet. I was thinking of a double muffin fan exhaust, that would have one muffin fan pulling from the box into an inline carbon filter and one fan on the end of the filter assisting the first fan.
thanks in advance for help and advice
peace and love
sicarii