Grow Light System on Amazon

Red1966 said:

Actually, the filter will last longer and work better.

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no air works by finding the path of least effort to find a balance of pressures

matching the filter to the correct speed on the fan is the only way to ensure u get that life and power from it (fans to weak it will drawl from only part not the whole thing over time that section gets over worked and then stops capturing the smell completely)..........the air will still pass over the used up part it is not like clogs and then uses the part deeper

alls carbon is doing is traping the chemical smell that was in the air the air keeps passing tho

dak1b said:

justugh,

My room size is: 8L x 4W x 8H. Don't think i need a carbon filter. Smell shouldn't be an issue. The duct and fan should work fine. I'll add carbon if smell does somehow become an issue.
The duct will run into the room outside. Its ok if it smells like weed.

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256......means u need a minal of 85 cfms

ok u are using a hid light so it need to be 30% stronger to help control the heat it makes ..............u said your area is 70 so that only gives u 10 degrees (80 thc degrades faster)

http://www.amazon.com/VenTech-Hydroponic-Inline-Carbon-Control/dp/B0051HDECS

filter matched to the fan it should be a little on the over kill for your set up but it will ensure that the temps stay with in that 10degree play room u have


now if u do not want a carbon filter ................the fan u linked me will work but u will need 2 of them 1 for the exhusting out and 1 for a powered intake
the powered intake one u can make a filter box and clean the air up for plants while u keep it cool and with in that 10 degree area here is how

justugh said:

no
dimable means it has one set power and u can lower it
select a watt is just that select a watt .............100% of 400 or 600 or 1000 no dimming

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The only difference is the numbers they put on the dial. The effect is exactly the same.

justugh said:

no air works by finding the path of least effort to find a balance of pressures

matching the filter to the correct speed on the fan is the only way to ensure u get that life and power from it (fans to weak it will drawl from only part not the whole thing over time that section gets over worked and then stops capturing the smell completely)..........the air will still pass over the used up part it is not like clogs and then uses the part deeper

alls carbon is doing is traping the chemical smell that was in the air the air keeps passing tho

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You're confusing a defect in the filter with a defect in the fan. Even with a stronger fan, nearly all the air would go thru this "weak spot". A over-sized filter (or undersized fan) allows the air to move thru the filter slower, giving it more time in contact with the carbon, making it more effective.

I have 3 1000 watt Apollo's. They've been pretty good but I think one just blew up last night. Time to try their warranty service (3 years). Can't beat the price though. You will find them on eBay (low_baller) a bit cheaper too. I also have their GTAC hoods -- pretty nice. Light and seem to work well (but sharp edges).

Red1966 said:

The only difference is the numbers they put on the dial. The effect is exactly the same.

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sir if u think that then u really should go back to school

dimmable is only one power a 1000 it can not select a watt it can dim a 1000w on 100% is 1000w .....75% is 750w .........50% is 500w

a select a watt does 100% power of 400w 600w and 1000w ...............no dimming no off numbers it only works at 100% power on the watt u selected

that is 2 different things

what is the point of a dimmer? lower lumens?

Red1966 said:

You're confusing a defect in the filter with a defect in the fan. Even with a stronger fan, nearly all the air would go thru this "weak spot". A over-sized filter (or undersized fan) allows the air to move thru the filter slower, giving it more time in contact with the carbon, making it more effective.

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think of of it like this ...............take a pipe and drill 12 holes in it now run water tho it ................at full power on the water all 12 holes are ejecting water........lower that pressure and only some of the holes are letting the water out of them

now reverse that and use air and it is the same thing

dak1b said:

what is the point of a dimmer? lower lumens?

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allows u to in thoery change the bulbs ....... out for a lower one

justugh said:

sir if u think that then u really should go back to school

dimmable is only one power a 1000 it can not select a watt it can dim a 1000w on 100% is 1000w .....75% is 750w .........50% is 500w

a select a watt does 100% power of 400w 600w and 1000w ...............no dimming no off numbers it only works at 100% power on the watt u selected

that is 2 different things

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You mean 40%, 60%, and 100%. 400 watt is not 100% of 1000. You're trying to make a distinction that doesn't exist. Galaxy refers to their select-a-watt as "dimming control". They just use percentages that coincide with common bulb sizes, but you can still dim a 1000w to 600w or 400w, instead of 500w or 750w. There is only one core, no matter which you buy. Growers House did an experiment with various dimmable ballasts and bulbs and found that dimming a bulb has very little effect on spectrum which was a concern of mine until I saw their experiment.

justugh said:

think of of it like this ...............take a pipe and drill 12 holes in it now run water tho it ................at full power on the water all 12 holes are ejecting water........lower that pressure and only some of the holes are letting the water out of them

now reverse that and use air and it is the same thing

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That's a solid, non-porous object with a liquid subject to gravity. A filter is a porous object using a gas that is not subject to gravity since it is immersed in the same gas. Even if you took the end plate off the filter, some gas would still be drawn through the sides of the filter. Every square inch of the filter is subject to the exact same pressure differential. As long as it isn't a sealed surface, there will be some air flowing through it.In your example, which holes does the water come out? => The bottom holes, right? Gravity, man, gravity.

justugh said:

allows u to in thoery change the bulbs ....... out for a lower one

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Or just dim a larger one. But DO NOT overdrive a smaller one, as it will likely blow or have a drastically reduced lifespan.

Red1966 said:

You mean 40%, 60%, and 100%. 400 watt is not 100% of 1000. You're trying to make a distinction that doesn't exist. Galaxy refers to their select-a-watt as "dimming control". They just use percentages that coincide with common bulb sizes, but you can still dim a 1000w to 600w or 400w, instead of 500w or 750w. There is only one core, no matter which you buy. Growers House did an experiment with various dimmable ballasts and bulbs and found that dimming a bulb has very little effect on spectrum which was a concern of mine until I saw their experiment.

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have a look again .........it is 100% 75% 50% ...............if they were dead on i would not be saying a word about it since it would be the same thing but the models he is looking at and compairing are the same basic design .............dimable 100% 75% 50%

here is a pic of the apollo taken by me

Red1966 said:

That's a solid, non-porous object with a liquid subject to gravity. A filter is a porous object using a gas that is not subject to gravity since it is immersed in the same gas. Even if you took the end plate off the filter, some gas would still be drawn through the sides of the filter. Every square inch of the filter is subject to the exact same pressure differential. As long as it isn't a sealed surface, there will be some air flowing through it.In your example, which holes does the water come out? => The bottom holes, right? Gravity, man, gravity.

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both water and air act in the same way ..............they look for the path of least effort to find a balance in pressure

whirlpool is just a twister in the water .........air passing plane's wings makes it lift or decend .....water passing over subs fins makes it lift or decend
heck look at underwater designs vs designs for the sky

gas liquid and plasma all act in about the same way certin things are the same and predictable just like with a solid

Red1966 said:

Or just dim a larger one. But DO NOT overdrive a smaller one, as it will likely blow or have a drastically reduced lifespan.

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dimable lights are just bad period ..............i did not see this test your talking about but my own eyes i have seen it

take a 600w hps and turn it on 100% power u get a yellowish red ...........75% power u are seeing more blue then red 50% almost looks like a MH nothing like a HPS so i know it changes the the light waves

why do u think on HPS it tells u to give it 2 to 5 mins to warm up do not freak about the color looking off ...............u dim it the color is off since it not getting to full power

justugh said:

both water and air act in the same way ..............they look for the path of least effort to find a balance in pressure

whirlpool is just a twister in the water .........air passing plane's wings makes it lift or decend .....water passing over subs fins makes it lift or decend
heck look at underwater designs vs designs for the sky

gas liquid and plasma all act in about the same way certin things are the same and predictable just like with a solid

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Gas and liquids DO NOT act the same. Underwater foils are flat, air foils are curved on one side, flat on the other. Foils don't have anything to do with it. You're a nice guy, but, damn, you are stubborn!

Red1966 said:

Gas and liquids DO NOT act the same. Underwater foils are flat, air foils are curved on one side, flat on the other. Foils don't have anything to do with it. You're a nice guy, but, damn, you are stubborn!

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not stuborn when i see the proof.......but someone telling me something i see no proof of and everything i have learned is a different way

where am i wrong ...........and no not flat look again (flat equals drag maybe in the the old designs ) now a days it is almost a mimic for the planes wing a oval (tear drop) shape
http://www.dsto.defence.gov.au/publications/3442/DSTO-TR-1622.pdf
page 30

edit..........opps i had the wrong page post fixed now

it is all the same thing getting maximum use out of the items ..............if u put a sub in a water and do a dye test it will do the same thing as a plane in a wind tunnel

it will always look for even pressure using as little effort as it can .........................a fan sucking lower will not drawl tho the stuff at the very end when it can get the air from the upper part.......just like a pipe with holes

and since the air does not clog up the pores just passes tho them it will never use use that part of the carbon so far away it will just keep passing all that air over the used stuff doing nothing to it .............u have wasted carbon and lowered the useable time on it

justugh said:

not stuborn when i see the proof.......but someone telling me something i see no proof of and everything i have learned is a different way

where am i wrong ...........and no not flat look again (flat equals drag maybe in the the old designs ) now a days it is almost a mimic for the planes wing a oval (tear drop) shape
http://www.dsto.defence.gov.au/publications/3442/DSTO-TR-1622.pdf
page 23

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Gases are compressible, liquids are not. In your example of the pipe with holes in it and water, the water comes out the holes on the bottom, because gravity over comes pressure. Air would come out all the holes. If the water pipe was submerged under water, or there was no gravity, the water would come out all the holes. The amount coming out each hole is proportional to the size of the hole. No matter how small the hole is, it still gets a proportional amount.(Unless the hole is smaller than the smallest molecules in air). If you look at a water foil closely, you'll see that both sides are the same shape. Flat in the middle,rounded at the front, and tapered to an edge at the rear. They don't taper the front to an edge because it would too easily be damaged and a rounded edge works nearly as well. An airplane wing is flat or nearly flat on the bottom while the top has a pronounced curve. But air and water foils really are a separate issue. I really may not be explaining it well.

justugh said:

it is all the same thing getting maximum use out of the items ..............if u put a sub in a water and do a dye test it will do the same thing as a plane in a wind tunnel

it will always look for even pressure using as little effort as it can .........................a fan sucking lower will not drawl tho the stuff at the very end when it can get the air from the upper part.......just like a pipe with holes

and since the air does not clog up the pores just passes tho them it will never use use that part of the carbon so far away it will just keep passing all that air over the used stuff doing nothing to it .............u have wasted carbon and lowered the useable time on it

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If you place the end lower it will still draw from the closer end. That is a function of the length of the tube, not gravity. The length of the tube adds drag. Let's say you have a in line fan blowing into a long tube. Two openings, one attached to the fan, the other open to the atmosphere. Place a pressure gauge near each end. Turn the fan on. The gauge near the fan will register a higher pressure. Thats because the tube itself creates drag, causing pressure. Now poke a tiny hole in the tube near the fan. Air will come out that hole, even though it has that giant "weak spot" at the other end. Poke a hole any where along the tube and air will come out. In this case, the amount varies according to two factors. The size of the hole and the distance from the fan(due to pressure drop along the length of the tube). In a filter, Yes, the "weak spot' flows more air because it is a bigger hole, but all the holes still flow air. Filter makers try to make the carbon of equal thickness and density as much as possible so they get as even as a flow throughout the filter as possible, but it doesn't have to be perfect. If the air is flowing too quickly, the odor molecules don't have as much time to be trapped on the surface of the carbon. So if the filter is oversized to the fan, the volume of air remains nearly the same, but velocity slows. This allows the air to be in contact with the carbon for a longer period of time, thus allowing more of the odor to be trapped.