Hooking a inline fan to your HPS

[Welsh-Smoker]

Hi I am struggling to keep my tent temperature down and was wondering if anyone knows how to hook up my inline fan to suck air hot from my wing reflector and out of my tent, but still use my carbon scrubber? I have typed loads of things in the search bar to try to find out how but I can not find any threads on this, can anyone help me please???

 

[Cartel530]

Run duct from the highest vent out of the tent into your inline fan then to your scrubber.. Unless you have another inline.

 

[Welsh-Smoker]

Run duct from the highest vent out of the tent into your inline fan then to your scrubber.. Unless you have another inline.

Yea that's how I have it set up mate. What I meant was how to suck the hot air directly from the reflector a bit like a cooling tube. The only way i can think of doing it is like this - carbon scrubber outside tent then ducting to my inline fan inside tent and then ducting atatched directly in reflector close to bulb?? But would this effect my carbon scrubber as it will be blowing out air instead of sucking air out? Will this method leave out smell???? Cheers mate!!

 

[onthaherb]

One inline:
Inside tent -> Scrubber -> Reflector -> Fan -> Out

Two inline:
In -> Reflector -> Fan -> Out (use on the same timer as your light)
Inside tent -> Fan/Scrubber -> Out (get a $50 day/night controller to maintain perfect temps)

 

[Welsh-Smoker]

One inline:
Inside tent -> Scrubber -> Reflector -> Fan -> Out

Two inline:
In -> Reflector -> Fan -> Out (use on the same timer as your light)
Inside tent -> Fan/Scrubber -> Out (get a $50 day/night controller to maintain perfect temps)

So I will need two inline fans is it buddy? I cant afford another one at the moment. Could I just have my scrubber outside blowing instead of sucking? Would the scrubber work the same smell wise?

 

[Harry Gypsna]

Another way, is to build a box for your filter, have the filter in the box, along with the fan outside the tent, then your duct is going Reflector-duct out of the tent-box filter-fan out the window(or wherever you are venting to).
The box doesn't need to be anything fancy, just sealed up well, you could do it with correx or use a toybox sort of thing, or build it from plywood.
When you can afford a 2nd fan, that is the way to go, then you can have your smell control and airflow separate from your light cooling, with your light being cooled with air from outside the tent.
Growell has a how to about doing the filter box thing.
You shouldn't blow through the filter, it won't last as long and you will be bypassing the prefilter(the white fluffy thing) allowing the filter to clog up with dust.

 

[messn'n'gommin']

How many and what wattage lights?

What size and CFM of a fan?

Cubic volume (or even square foot of area) of a grow area?

An oscillating fan will stir up the air (ideally across the tops of the plants but just below the light) making for an overall average temp for extraction, if the exhaust fan is strong enough. Air will flow in the direction of the least resistance and if it is only flowing in a narrow direction, it will bypass (more or less) some of the rest of the whole of the cubic area. e.g. Intake is located in the lower right and the fan/filter draws from the upper right, air flow will come in and go straight up rather than drawing to the upper left, creating a cross-flow.

 

[Welsh-Smoker]

Another way, is to build a box for your filter, have the filter in the box, along with the fan outside the tent, then your duct is going Reflector-duct out of the tent-box filter-fan out the window(or wherever you are venting to).
The box doesn't need to be anything fancy, just sealed up well, you could do it with correx or use a toybox sort of thing, or build it from plywood.
When you can afford a 2nd fan, that is the way to go, then you can have your smell control and airflow separate from your light cooling, with your light being cooled with air from outside the tent.
Growell has a how to about doing the filter box thing.
You shouldn't blow through the filter, it won't last as long and you will be bypassing the prefilter(the white fluffy thing) allowing the filter to clog up with dust.

Wow this is a really good idea mate and I never would have thought of it haha. Do you use this method of extraction?? I attached my carbon scrubber to the top of my reflector earlier and I just went to check the temps and they have risen so it was a bad idea, I thought that would have worked? I think I will definatly be trying your idea buddy thanks for the help mate!!!

 

[Welsh-Smoker]

How many and what wattage lights?

What size and CFM of a fan?

Cubic volume (or even square foot of area) of a grow area?

An oscillating fan will stir up the air (ideally across the tops of the plants but just below the light) making for an overall average temp for extraction, if the exhaust fan is strong enough. Air will flow in the direction of the least resistance and if it is only flowing in a narrow direction, it will bypass (more or less) some of the rest of the whole of the cubic area. e.g. Intake is located in the lower right and the fan/filter draws from the upper right, air flow will come in and go straight up rather than drawing to the upper left, creating a cross-flow.

Hi alright, my light is a 600hps with a wing reflector.
I'm not really sure what CFM my inline fan is buddy i had it with my tent as a kit, and the box it came in was plain with no info on the inline, it is quite powerful though I have felt a lot weaker ones.
My grow tent is 1.2M wide by 1.2M length and 6ft tall.

I do have a oscillating fan its rather 16 or 18 inches its pretty big. I have the oscillating fan on the right side of the tent leaning up against the side flap vent with the flap up to try to draw some cool air in! I also have the fan aimed directly up at the light to try to blow the air up into my scrubber, is this wrong? My inline fan and scrubber is located on the top, back, left side of my tent. Where would you recommend I pute my oscillating fan buddy???

Thanks for the help mate

 

[Harry Gypsna]

I haven't used the filter in a box in my own garden, but I have set it up for 3 different people I know and it works great. Just make sure the fan is "behind" the box, and you are still sucking through the filter, not blowing, and make sure the box is fully sealed up. Good quality duct tape is your best buddy.
I will be using the filter in a box in the garden I am setting up for myself shortly.
Correx/corriboard and 2x1 battens are good to make the box. build the carcass, and put correx on the inside and the outside. If you put some kind of insulation ( If you are careful you can use expanding polyurethane from a can) in the gap between correx layers and you will get some noise reduction. Build another box for the fan and suspend the fan from shock cord inside the box and you will get even more noise reduction.
You can get mini clip on oscillating fans, about 7 inches, very cheap on ebay, much better than a large desk/pedestal fan in a small tent. Point them back towards the walls, not at the plants.

 

[donmekka]

Outside my tent sits the carbon filter on top of that sits my 6in inline fan then there is 6in ducting running to my hood and does a good job keep smells and temps at bay.

 

[Welsh-Smoker]

Outside my tent sits the carbon filter on top of that sits my 6in inline fan then there is 6in ducting running to my hood and does a good job keep smells and temps at bay.

Ah sorted nice one mate ill set mine up like that then and have my scrubber blowing outside the tent?
What size tent do you have buddy? How many oscillating fans do you have in your tent? What type of light do you have mate? Do you have any intake fans pushing air into your tent? Sorry about all the questions this is my first grow and im wondering what type of set up others have in theyre tents?? Thanks mate

 

[TribalSeeds]

I have a hard time controlling heat in tents with the flaps up. I do better closing the flaps and hooking up a duct for the intake without a fan. I just use the exhaust to suck air through the duct passively.

 

[messn'n'gommin']

Hi alright, my light is a 600hps with a wing reflector.
I'm not really sure what CFM my inline fan is buddy i had it with my tent as a kit, and the box it came in was plain with no info on the inline, it is quite powerful though I have felt a lot weaker ones.
My grow tent is 1.2M wide by 1.2M length and 6ft tall.

I do have a oscillating fan its rather 16 or 18 inches its pretty big. I have the oscillating fan on the right side of the tent leaning up against the side flap vent with the flap up to try to draw some cool air in! I also have the fan aimed directly up at the light to try to blow the air up into my scrubber, is this wrong? My inline fan and scrubber is located on the top, back, left side of my tent. Where would you recommend I pute my oscillating fan buddy???

Thanks for the help mate

Then fan/tent/filter package deal is probably set-up for what you want it to do.

What Harry Gypsna said about the oscillating fan! He is also right about you don't really want the fan blowing directly on the plants. I said just above the plants and just below the light, so I failed to say it right. The point to be made is that you want the fan stirring up the air to avoid "hot spots," as it were.

Peace, bro!

 

[donmekka]

Ah sorted nice one mate ill set mine up like that then and have my scrubber blowing outside the tent?
What size tent do you have buddy? How many oscillating fans do you have in your tent? What type of light do you have mate? Do you have any intake fans pushing air into your tent? Sorry about all the questions this is my first grow and im wondering what type of set up others have in theyre tents?? Thanks mate

I run a 3x3x6 tent with a 600 no intake just a pieces of 6in duct at the bottom that has a bend to prevent light pollution no fans in the tent the up draft is plenty IMHO.

 

[Harry Gypsna]

What Harry Gypsna said about the oscillating fan! He is also right about you don't really want the fan blowing directly on the plants. I said just above the plants and just below the light, so I failed to say it right. The point to be made is that you want the fan stirring up the air to avoid "hot spots," as it were.

Peace, bro!

Above the plants is fine too, a little breeze rustling the plants won't hurt, but the fans have a tendency to make much more than a little breeze even on the lowest setting. That's why pointing them at the corners works well as it spreads the airflow out and slows it down.

Welsh-Smoker, what size is your fan, I'm guessing 5 or 6 inch (125/150mm). We can work out roughly what your M3/Hr or CFM is if we know the size, as generally speaking, they move roughly the same amount air across the different brands, for a given size. I'm assuming it is a centrifugal inline(flying saucer shape with duct fitting on either side.).

 

[Welsh-Smoker]

Above the plants is fine too, a little breeze rustling the plants won't hurt, but the fans have a tendency to make much more than a little breeze even on the lowest setting. That's why pointing them at the corners works well as it spreads the airflow out and slows it down.

Welsh-Smoker, what size is your fan, I'm guessing 5 or 6 inch (125/150mm). We can work out roughly what your M3/Hr or CFM is if we know the size, as generally speaking, they move roughly the same amount air across the different brands, for a given size. I'm assuming it is a centrifugal inline(flying saucer shape with duct fitting on either side.).

Alright buddy I dont have my fan pointing at my plants I have been having it pointing directly at my light to cool my light but i think it has been blowing the heat from the light around the room, so then i moved it just below the light like you said buddy. Oh and my oscillating fan is 16inches its huge its a real room fan!! I've been wondering if my fan is too big for my tent, and just blowing the heat around the tent?? Would this be the problem mate???

 

[Harry Gypsna]

Alright buddy I dont have my fan pointing at my plants I have been having it pointing directly at my light to cool my light but i think it has been blowing the heat from the light around the room, so then i moved it just below the light like you said buddy. Oh and my oscillating fan is 16inches its huge its a real room fan!! I've been wondering if my fan is too big for my tent, and just blowing the heat around the tent?? Would this be the problem mate???

Hi, that oscillating fan is a tad large for a 4'x4' tent, probably doing exactly what you say and the heat is bouncing back off the ceiling and back down into the canopy.
When I asked about fan size, I meant your inline fan for the filter/extraction.
Clip on fans are great for tents. An oscillating one will cost about 12 quid(plus P&P) or a fixed one will be under a tenner(plus P&P). I'd have 2, placed in opposite corners, pointing into the corner.
Another good solution for air movement within the tent is to get a couple of aquarium fans like this
http://www.ultimatereef.net/uploader/2009Q1/FAN1_1.jpg


Toke it easy

 

[Welsh-Smoker]

Hi, that oscillating fan is a tad large for a 4'x4' tent, probably doing exactly what you say and the heat is bouncing back off the ceiling and back down into the canopy.
When I asked about fan size, I meant your inline fan for the filter/extraction.
Clip on fans are great for tents. An oscillating one will cost about 12 quid(plus P&P) or a fixed one will be under a tenner(plus P&P). I'd have 2, placed in opposite corners, pointing into the corner.
Another good solution for air movement within the tent is to get a couple of aquarium fans like this
http://www.ultimatereef.net/uploader/2009Q1/FAN1_1.jpg


Toke it easy

Yea I thought that would have been my problem. Ah right my inline fan is 4inch and my scrubber is 4inch well the attachment parts which stick out for ducting are 4 inches but the fan is about 6inches and the scrubber is to, if you understand what I mean lol. Ah nice one for the help buddy I think ill invest in two clip on fans thanks again

 

[Easy7]

If your having heat issues now wait untill winter, unless your in the southern hemisphere. I like inline scrubbers I make to go with inline fans. Just takes a pvc pipe the size of the duct with some packing tubes the same size. Add some panty hose and pack it full of pellet carbon.