5x8 ventilation

Y

Yooper1968

Member
Question if my room is 5x8 I have a 12 inch duct on a rheostste thst I plan on reducing to accept a 6 inch filter.
Could I run this intermittently on my inkbird 308 on the cooling side at 78 or would need a separate say...6 inch duct and filter to be on 100% ? Ty
Plan on 4 to 6 autos at a time of 3 to 4 photos
 
Chip Green

Chip Green

Well-Known Member
As a fellow Yooper up der, management of conditions is our greatest challenge.
I can't answer your question specifically, but I can tell you that each one of my rooms is unique in the way I manage temps, and humidity as the seasons progress.
I find the dead of winter to be the most predictable, because there is one ambient outdoor condition set.
F'n COLD, and f'n DRY....
Spring sucks balls. All over the place.
 
Y

Yooper1968

Member
Chip Green said:
As a fellow Yooper up der, management of conditions is our greatest challenge.
I can't answer your question specifically, but I can tell you that each one of my rooms is unique in the way I manage temps, and humidity as the seasons progress.
I find the dead of winter to be the most predictable, because there is one ambient outdoor condition set.
F'n COLD, and f'n DRY....
Spring sucks balls. All over the place.
Click to expand...
Hi fellow yoop! I'm mainly concerned if I need to run my exhaust continuously while in flower
 
Chip Green

Chip Green

Well-Known Member
I found it a constant series of adjustments. Some days full blast, other times it has to be dialed back, still others a short cycle timer was needed to stay in the optimal zones.
Ride the wave.
 
Renfro

Renfro

Well-Known Member
Chip Green said:
I found it a constant series of adjustments. Some days full blast, other times it has to be dialed back, still others a short cycle timer was needed to stay in the optimal zones.
Ride the wave.
Click to expand...
Do you use an environmental controller of any sort or just speed control and the timer?
 
DailyBlastin

DailyBlastin

Well-Known Member
cant answer your question sorry, however i never pass an opportunity to remind people that rheostat speed controllers are JUNK and will kill your fans. If you need to control the speed of the fan the only proper way to do it is with a variac controller, allows you to control the actual voltage being send to the fan, allowing you to slow it down properly, rheostat controllers function by continuously switching your fan on/off to "achieve" the set "speed". as it is with most things you get what you pay for, so if you wanna use a 15-20$ rheostat controller and have it kill your fan sooner than later then go for it, you wanna do things right spend the 50-80$ on a true variac controller.
 
Renfro

Renfro

Well-Known Member
DailyBlastin said:
cant answer your question sorry, however i never pass an opportunity to remind people that rheostat speed controllers are JUNK and will kill your fans. If you need to control the speed of the fan the only proper way to do it is with a variac controller, allows you to control the actual voltage being send to the fan, allowing you to slow it down properly, rheostat controllers function by continuously switching your fan on/off to "achieve" the set "speed". as it is with most things you get what you pay for, so if you wanna use a 15-20$ rheostat controller and have it kill your fan sooner than later then go for it, you wanna do things right spend the 50-80$ on a true variac controller.
Click to expand...
yeah many of the "solid state" speed controllers chop up the clean sine wave and that makes the motor groan. Using a variac is the gold standard for speed control on most AC motors. I have several around my grow. I have one thats on some massive 24 inch oscillating wall fans, I put them on their low speed and cut the volts to about 50 and they move just the right amount of air.
 
Renfro

Renfro

Well-Known Member
It should be noted that although loud, a centrifugal blower will cope with static pressure losses much more efficiently. Mixed flow and axial fans lose CFM rapidly when poorly ducted. Using slinky duct for example kills the clean laminar flow. Slinky duct, bends, reductions, carbon filters are all common static pressure loss points. Over sizing a centrifugal blower and slowing it with a variac can provide silent operation AND adequate CFM.
 
DailyBlastin

DailyBlastin

Well-Known Member
Renfro said:
yeah many of the "solid state" speed controllers chop up the clean sine wave and that makes the motor groan. Using a variac is the gold standard for speed control on most AC motors. I have several around my grow. I have one thats on some massive 24 inch oscillating wall fans, I put them on their low speed and cut the volts to about 50 and they move just the right amount of air.
Click to expand...
yea i have several from when i was running multiple tents, only need the one with my current setup- 2x2x5 flower room with a 197cmf 4" fan, volts dialed down to 55 is perfect for me, getting perfect air exchange by my calculations as well as lights-on temps never going above 78. :bigjoint:
 
PadawanWarrior

PadawanWarrior

Well-Known Member
Renfro said:
yeah many of the "solid state" speed controllers chop up the clean sine wave and that makes the motor groan. Using a variac is the gold standard for speed control on most AC motors. I have several around my grow. I have one thats on some massive 24 inch oscillating wall fans, I put them on their low speed and cut the volts to about 50 and they move just the right amount of air.
Click to expand...
Damn. I could buy a lot of Brawndo with that bill. Nice man. I'm actually wearing my new Brawndo shirt right now, lol.
 
Chip Green

Chip Green

Well-Known Member
Nah Renfro, I'm still in single A ball, haven't moved into much automation just yet. My rooms are still pretty rudimentary as far as physical construction, so I just manually deal with the swings.
I'm pulling ahead of the pack in my local circles rapidly, so the capital is on the horizon to do a complete setup from square one, call myself up to the big leagues.
 
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