Exhaust/intake requirements advice

Start your next run with training in mind. 4 5gal pots max. Or 2 10…1 20.

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On a seperate note - is that your ride in your pic? :eyes:

Im literally just back from the TT races in isle of man, bike heaven man! Met a weed farmer from San Fran and it never struck me to ask if he was on here. Poor dude was having a hard time of it holding up his very drunk buddy haha

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Terrabloom is a good carbon filter.

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It was. Getting old so sold it. Got heavy for me…:slight_smile:

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Generally what you’ll find is that the fans that we want to use to move air through the tent will need greater than the size of their own port, in order to reach their max rated flow. Providing that it isn’t being choked to death by a restrictive carbon filter, or grossly overpowered, etc.

Look at the flow map below. I made up the actual number of ports to reach max flow just to give you an idea of what happens, but in flowing my own fan, it needed 5x its own intake port size before it hit max flow.

The fan is at 100% power:

So that fan at 100% power will flow 300 cfm at zero static pressure - in other words, no restrictions on either side of the fan.

Installed in a tent with no exhaust ports & running at 100% power, it flows 0 cfm & creates its max static pressure, & will either suck the tent in or blow it out, depending on if you are pushing or pulling through.

Add one 6" exhaust port & it flows 100 cfm (I’m guessing here, based on some of my own testing on similar but different fans), & the static pressure drops a little.

So let’s stop there & think a minute. If you’re going to add a 6" fan to the intake, it’s going to see the 6" exhaust as the same restriction. So they are both limited to around 100 cfm at max power. So you might see 200cfm running both of those fans that you just bought, at 100% power.

Or, looking at the graph, you could hit 200 cfm with one fan by running two 6" intakes, & either turn down the power since you’d be making excess pressure at that point, or you could add a third 6" hole for even more flow. (Again, I’m estimating the numbers of holes, but you can flow test & make your own flow chart for your own fan.)

Beyond that, you could run both of those fans in parallel (fans side by side, both pushing or pulling) instead of in series (fan on intake & exhaust port) at 100% power, give each of them the intake area that they need, & hit the max combined rating of 600 cfm. The same two in series got you 200 cfm (estimated) at 100% power. That example is really just to clear things up more when you think about it, because if you need that much more flow beyond what the first fan can do, you’d probably be better-off just going with a more powerful fan instead of actually running two of them.

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Thank you man i took the time to digest what you were saying. Its better to know the answer than just get the answer.

And i really, really love your grow setup by the way i been watching your evolution log for a while, thats my goal when i have my own place right there

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Hey dudes have had a big humidity spike here the last while, wondering when i kick this thing on (6 inch AC Infinity) will that help it much? If not any recommendations on a dehumidifier?

Cant test it yet as they didnt send me the controller, thing is like a plane engine by default

@patrick1960 it was hardly you? A friend corrected me that it wasn’t San F

Was watching lots of it. That must have been a thrill. Those guys are courageous and crazy. I follow Motorsports and clicked a few bucket lists. A few years ago I went to 24 H of LeMans( camped for 4 days). After the race my friend from the Netherlands with a BMW, says let’s go do laps at Nurburgring. We drive from France to Nurbur. 25 dollars a lap, we did 5. What a thrill.

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I have a friend whos brother in law just finished the 24hr in Lemans, must get his name!

Yea it was amazing at TT dude but unfortunately some cancelled races with the weaher but there was no deaths this year so thats a plus!

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Rare for no deaths, a terrifying event.

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