10" exhaust fan + duct into 6" cool tubes?

Running 4 600w hps lights in my tent just with regular reflectors but am getting high temps. Got a 10 inch exhaust fan pulling the air our but if I have 10" duct how do I incorporate 6" cool tubes into my setup?

Do I use an adapter and have the air pulling through the filter, exhaust fan, duct, cooltubes then outside the tent or do I have it seperate.

Cheers in advance people....

Do you have 1 or 2 rows of lights? If 2 rows you could get a 10-8 reducer and then a 8-6-6 wye. If 1 row get a 10-8 and a 8-6 reducer.

bazookajoe said:

Do you have 1 or 2 rows of lights? If 2 rows you could get a 10-8 reducer and then a 8-6-6 wye. If 1 row get a 10-8 and a 8-6 reducer.

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So should I start at my filter/fan then straight to the cool tubes and zig zag through like an S then straight out the tent all in one stretch of duct? Thats with the reducers? Its a single row by the way.

Should I expand back to 10" before I exit the tent or just leave it at 6?

Also will this be a waste of my 10" exhaust because I am reducing to 6"?

Cheers

I think the best setup would be some kind of manifold setup.

Like this; 10 inch fan in a 10 inch duct to exhaust, attach two or four 10 inch to 6 inch takeoffs (10"x6"x10" tees), cap the 10" manifold at the end. The cool hoods can be run in series or parallel depending on how much room you have. You can put the filter right before the fan or after it if you don't have room (just make sure your joints are airtight if you put it on the positive pressure side)

ShazMo09 said:

So should I start at my filter/fan then straight to the cool tubes and zig zag through like an S then straight out the tent all in one stretch of duct? Thats with the reducers? Its a single row by the way.

Should I expand back to 10" before I exit the tent or just leave it at 6?

Also will this be a waste of my 10" exhaust because I am reducing to 6"?

Cheers

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If you have more than 1 row you will be pulling from, no it isnt a waste using the 10" on (2) 6" legs.
If you are going to do it all in series, then yes its a waste to use a 10" fan just to reduce down to a 6" line.
Im pretty sure this is why @bazookajoe had asked how many rows of lights you use in your tent.

HydroRed said:

If you have more than 1 row you will be pulling from, no it isnt a waste using the 10" on (2) 6" legs.
If you are going to do it all in series, then yes its a waste to use a 10" fan just to reduce down to a 6" line.
Im pretty sure this is why @bazookajoe had asked how many rows of lights you use in your tent.

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So what is your opinion if I only have 1 row of 4 lights? How could I utilize this 10" setup if I incorporate cooltubes?

ignatiousR said:

I think the best setup would be some kind of manifold setup.

Like this; 10 inch fan in a 10 inch duct to exhaust, attach two or four 10 inch to 6 inch takeoffs (10"x6"x10" tees), cap the 10" manifold at the end. The cool hoods can be run in series or parallel depending on how much room you have. You can put the filter right before the fan or after it if you don't have room (just make sure your joints are airtight if you put it on the positive pressure side)

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They are all in a row. So you mean have the 10x6x10 tee along one side of the hoods and cap at the end of that side.

What about the exhaust on the exit of the tubes? Connect with tee's again and just exhaust from a 10" just like the beginning?

ShazMo09 said:

They are all in a row. So you mean have the 10x6x10 tee along one side of the hoods and cap at the end of that side.

What about the exhaust on the exit of the tubes? Connect with tee's again and just exhaust from a 10" just like the beginning?

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I'm having trouble visualizing your setup. Do you have a picture or a drawing?

First image is just a 6" intake with no fan. 2nd is the lights and 3rd is the base of tent.

The filter and exhaust in the back corner goes straight up and out from the top.

Those 4 600's are just way too hot atm so we dropped back to 3.

My mate suggested having another 6" intake running from outside throught the tubes(when we get them) then to a single Tee 10x6x10 just above the fan.

ignatiousR said:

I'm having trouble visualizing your setup. Do you have a picture or a drawing?

Click to expand...

Uploaded

You want your 10" duct to split into at least two 6" ducts. If you split into two each 6" duct serves two cool hoods inline. If you can use rigid duct, not the flex kind, and try to do it with the least amount elbows/turns that you can.

Do you already have the cool tubes? If not, I'd suggest just reconfiguring your room to start. Your filter should be up top (ceiling level) pulling the warm air from the tent, not on the floor where you currently have it. Your inlet should be near the floor on the opposite side of the filter (exhaust) and should be as big or bigger than the exhaust. If you are exhausting 10" you should have (2) 6" inlets. Do the tent walls bow in really bad when the fan is on?
Second, how warm/cool is the air you are pulling from? If the room you have the tent in is 80*F and your tent is pulling air from said room to cool the tent, your tent will never be any cooler than the room its in.....likely some degrees warmer at all times.

If you already have the cool tubes, you want a dual leg system like mentioned. The reason for this is if you have 4 lights in a row all on the same leg, the last light in that series will be a hot mess because it never sees any of the cooling air, just the hot air from the 3 lights in front of it.
If you have one fan pulling from 2 legs of 6" vented lights it wont be as restricting as pulling from a singular 4 light series on 6" line and 1 singular filter. It will also help reduce noise and cool the lights more evenly and efficiently run on 2 legs.
Quick doodle, hope this helps:

I agree with everything hydrored says in his post.

HydroRed said:

Do you already have the cool tubes? If not, I'd suggest just reconfiguring your room to start. Your filter should be up top (ceiling level) pulling the warm air from the tent, not on the floor where you currently have it. Your inlet should be near the floor on the opposite side of the filter (exhaust) and should be as big or bigger than the exhaust. If you are exhausting 10" you should have (2) 6" inlets. Do the tent walls bow in really bad when the fan is on?
Second, how warm/cool is the air you are pulling from? If the room you have the tent in is 80*F and your tent is pulling air from said room to cool the tent, your tent will never be any cooler than the room its in.....likely some degrees warmer at all times.

If you already have the cool tubes, you want a dual leg system like mentioned. The reason for this is if you have 4 lights in a row all on the same leg, the last light in that series will be a hot mess because it never sees any of the cooling air, just the hot air from the 3 lights in front of it.
If you have one fan pulling from 2 legs of 6" vented lights it wont be as restricting as pulling from a singular 4 light series on 6" line and 1 singular filter. It will also help reduce noise and cool the lights more evenly and efficiently run on 2 legs.
Quick doodle, hope this helps:
View attachment 4013347 View attachment 4013348

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Yes they bow, like they are getting sucked in.

The in take is coming straight from outside. We now have a 6" fan pulling air. Only lowered the temp a few degrees.

We dont have the cool tubes yet and are trying to sort this out before buying them. Gonna change the exhaust to cieling and intake to floor right now....

ShazMo09 said:

Yes they bow, like they are getting sucked in.

The in take is coming straight from outside. We now have a 6" fan pulling air. Only lowered the temp a few degrees.

We dont have the cool tubes yet and are trying to sort this out before buying them. Gonna change the exhaust to cieling and intake to floor right now....

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Im not shure where to begin since there are a few unanswered variable at play here.
(1) What are the temps outside that it is pulling from? Again, if its 80*F outside, and you are pulling your inlet air from outside -you can't expect it to be any cooler than that in the tent.

(2)Are you exhausting the heat outdoors (not just into the room the tent is in)?

Could you use the intake from the room you have the tent in and exhaust the filtered heat from the tent outdoors?

HydroRed said:

Im not shure where to begin since there are a few unanswered variable at play here.
(1) What are the temps outside that it is pulling from? Again, if its 80*F outside, and you are pulling your inlet air from outside -you can't expect it to be any cooler than that in the tent.

(2)Are you exhausting the heat outdoors (not just into the room the tent is in)?

Could you use the intake from the room you have the tent in and exhaust the filtered heat from the tent outdoors?

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I have just switched the exhaust and filter to the tent ceiling and the intake at the bottom. We have the exhaust venting into a grill on the wall which is sealed with duct tape so it is getting blown out of the room. I just opened the vent flaps around the base of the tent to see if that helps also.

As the exhaust is 10" stealth is a factor if I were to vent outside...

The temps outdoors today are 85....

Are you in flower? If you dont already, just run your 12 hr "light on" schedule at night when temps are cooler. Then you will draw nice cool night time air into your tent when the lights are on.

ShazMo09 said:

The temps outdoors today are 85....

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Can you switch your intake to inside air conditioned air and exhaust to outside? If you're bringing in 85 degree air your tent won't go below 85. Do you know where the exhaust goes after it enters the vent on the wall? I don't know how many plants you have, but you could be putting significant amounts of moisture into the house if it just goes to another room. Possibly enough to do some damage[/QUOTE]

10" duct needs to step down to 8" with a 10-8" reducer. Then you need to go from 8-6" reducer. From there you can branch out with 6" T-pipe.