Stickydog90
Member
So I want to do an indoor plant grow tent 27"x27"x63". The thing is I need to vent the heat(it gets hot AF during the summer)/smell to my chimney vent in the wall about 12 foot away. There is going to be about 9-10 90° bends in the duct leading to the chimney vent which will make the total length of the duct to be about 25'.
I know I'm planning on growing in an area that is approximately 30 cubic feet. I have to pull the hot/stinky air from a carbon filter (inside the tent), into the exhaust inline fan, through all the duct/9-10 90° bends (approximately 25' long), and into the chimney vent which probably extends another 12' into the open sky.
I am trying to figure out how to calculate different stuff. I don't need to have someone give me the correct answer but maybe just a formula. Although straight up answers are taken as I don't turn down any given advice!
Sources are fine too!
What I'd like to know:
1. What should be the rated CFM ( I know it should be rated at least 30 cfm, but all the bends/traveling should account for some air velocity to be lost, right?)
2. What size duct/fan should I use (4" would be ideal for the size for the space my duct location could fit)?
3.How do I calculate the loss of velocity through the length/bends of the duct?
Thanks so much in advance! Hope y'all are staying cool
Edit* ps: I'd like to use 4" flexible ducting if at all possible. I was planning on using an ac infinity 4" exhaust fan with a rating of 205 CPM, aswell as the carbon filter (about 14" long)
I know I'm planning on growing in an area that is approximately 30 cubic feet. I have to pull the hot/stinky air from a carbon filter (inside the tent), into the exhaust inline fan, through all the duct/9-10 90° bends (approximately 25' long), and into the chimney vent which probably extends another 12' into the open sky.
I am trying to figure out how to calculate different stuff. I don't need to have someone give me the correct answer but maybe just a formula. Although straight up answers are taken as I don't turn down any given advice!
Sources are fine too!
What I'd like to know:
1. What should be the rated CFM ( I know it should be rated at least 30 cfm, but all the bends/traveling should account for some air velocity to be lost, right?)
2. What size duct/fan should I use (4" would be ideal for the size for the space my duct location could fit)?
3.How do I calculate the loss of velocity through the length/bends of the duct?
Thanks so much in advance! Hope y'all are staying cool
Edit* ps: I'd like to use 4" flexible ducting if at all possible. I was planning on using an ac infinity 4" exhaust fan with a rating of 205 CPM, aswell as the carbon filter (about 14" long)
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