new techniques in cooling and exhaust, for me anyways

[rootfingers]

This question is in regards to the cooling of 3 1kw lights. They are all going to be placed in a row with 6" silverstar reflectors. There will not be any sharp angles in the ducting.

I am considering using a 4" in-line for intake and a 6" in-line for exhaust. I have these fans already and will use them before I go buy new ones.

Hopefully there won't need to be more than 20' of excess ducting on either side of the lights. We can, for the sake of this thread, assume there is 20' on both sides.

I know that during the cold months (0-40F) it will work but I am curious if they might work for temps to 70F. What do you think?

Has anyone ever combined in-line fans like this to cool your lights? How was that experience for you?

Also, I am considering running an exhaust fan 23 hours a day with a large fan (maybe 10") pulling through a carbon filter on the inside of my room and exhausting through a second carbon filter on the outside. This air will mingle with an ozone generator and will not be pulled back into the room.

Any thoughts on this sort of a setup. I haven't seen it done before and would love to here if anyone has done this. I run stank and really need to control the odor.

Would it be best to use different sizes of carbon filter?

Should I use a 12" fan and controller instead of a 10"?


I know this is a ton to be asking so I thank all well thought out replies in advance.

 

[green_tea]

whats the CFM on the fans?

 

[rootfingers]

The 4" is 152 cfm and the 6" is 309. These are elicent fans and the cfm ratings to my knowledge are accurate.

 

[phr3d0m2gr0]

I'm wondering if you could use the 6" and 4" as both outlets and either the 6" going to two of the lights and the 4" to one light. Or maybe you could connect the lights in series and then have a Y splitter after the lights with one end going to the 4" and one to the 6". This would allow you to use only one carbon filter also.

-Phr3

 

[green_tea]

in my opinion, if you are going to split it into two with a Y, you may as well get 2 carbon scrubbers.

this way you have protection if a fan goes out (for at least a little while)

 

[rootfingers]

Hey guys thanks for the replies.

I don't think I'm going to split it although I see how that might work in a different application.

What I'm going to do is put the 4" drawing from outside the grow room and the six on the other end exhausting out of the grow room, keeping the exhaust separate.

I will need to work out a fresh air intake but this shouldn't be a problem.

I guess I'll just do it this way and get back to you guys on how it works. Stepping away from convention a little sometimes might make a person learn something that may not have been possible without a detour

 

[phr3d0m2gr0]

So your using the 4" as an active intake? I don't think this is a good idea, but if your gonna try it then i'm interested to see what happens.

 

[rootfingers]

care to elaborate on why it is not a good idea?

 

[ChaosCatalunya]

Carbon filters need to be matched to the correct fan CFM. In the UK, RVK fans with Phat Filters are rated by knowledgeable friends.

I used to run 3x 1k in a small sloping loft space, all had duct spigots on the tops of the hoods, plumbed in 4" duct, into main 6" acoustic duct, straight up chimney and out 30feet above street level, not need using a carbon filter. Like a hunter waiting for his quarry up a tree, anybody walking past my house never smelt a thing.

I never liked fan controllers, the change in tone draws attention IMO, whereas a steady one is less noticeable.