Exhaust questions

[krazeesukur]

Hey im trying to figure out a way to make an exhaust set up for my closet the dimensions are 4x3x8 and i have no door, and there is only one plant growing in soil and a smartpot. I have a tower fan in there on oscilate on low and im just trying to figure out a way and i know you guys have tried some really good ideas out there so i would appreciate some ideas

Thanks

 

[exploziv]

any sources of clean air nearby? what are the space's "walls" made of?

how do you enter in there if you have no door?

 

[dnotrem]

A FEW TIPS I LEARNED THAT MADE VENTING A BREEZE

(Exhaust) CFM volume what will be required for you room
A 10 wide X 10' long X 10' high has 1000 cubic feet of volume (10x10x10=1000). So, a 200 cfm (cubic feet per minute of air flow) exhaust fan is required at Minimum (1000 cu ft divided X 5 min = 200 cfm). Now this is just an example to show what CFM is required to empty that space of air within a 5 min period with no heat !!! these are the other variables to that must be factored in, this was just a basic simple example
(10x10x10 = 1000) (1000/5 = 200)

(Exhaust) CFM’s will be needed for your room
Growers often multiply their square footage by eight too compensate for heat from lighting electrical…… to determine fan capacity for cooling. These are a requirement for optimal growing conditions.your exhaust is the most important part For example, a 10' wide X 10' long grow room would require 800 cfm fan capacity(10 X 10 = 100) (100 X 8 = 800).


(Intake) requirements
To determine your intake requirements really the easiest way is too subtract 25% of you exhaust CFM’s and you will be ok with in/out. Now we have the in/out figured out as a rule of thumb one square foot of opening to the area is required for every 700 cfm of exhaust output. So to make this a bit easier if your exhaust is 700 CFM’s too ensure even exiting flow passing threw each chamber it would take about 5 - 2" holes at each exit point of each chamber to produce a steady even flow
Otherwise static pressure (the room sucking into itself), will severely limit the exhaust output. So you need all you openings/holes ect… in one area to equal flow. Intake and exhaust must be exact but the air must move threw the enclose just as easy the only way I can put it is if you had a straw 4” around on each end but was only 2” around in the middle you only going to get what the 2” middle allows. These are just some tips I found for figuring this out. This is always is looked at as kind of complicated but when you break it down its not to bad just trying to remove the stigma from venting for the average Joe hope it helps Thanks



I just wrote this up and was going to post it for you guys and.....I seen this.
Here you go hope it helps you as much as it did me

 

[krazeesukur]

ok so i did the math and came up with i would need a fan with 19.2 cfm, which idk if they make a fan for that. Explosive, it's a closet in my room without a door on it, i've just learned to sleep with my flourescent light on and i believe its just drywall i was told by my roommate that we could just make a hole in the wall and run the exhaust into the attic, and there is an ac vent right above the closet opening. Idk if that was what u were looking for but hopefully we can figure something out. This is really bugging me because im about 2-3 weeks away from switching to my HPS and its only a 150 watt but i just wanna get this squared away before i flip it.

thanks

 

[dnotrem]

ok so i did the math and came up with i would need a fan with 19.2 cfm, which idk if they make a fan for that. Explosive, it's a closet in my room without a door on it, i've just learned to sleep with my flourescent light on and i believe its just drywall i was told by my roommate that we could just make a hole in the wall and run the exhaust into the attic, and there is an ac vent right above the closet opening. Idk if that was what u were looking for but hopefully we can figure something out. This is really bugging me because im about 2-3 weeks away from switching to my HPS and its only a 150 watt but i just wanna get this squared away before i flip it.

thanks

you need a 256 cfm exhaust fan and about a 225 cfm intake fan. you want to have your intake pull in fresh air or at least cooler air then whats in the room I would run my intake in the attic most houses have soffet venting or find some sort fresh air supply. as for your exhaust yea vent that bitch right into the attic anywhere. you want to try and get fresh air its better but if you cant get a door and vent threw that