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Inline fans or blowers?? hhmm
- Thread starter G4nj4Cali
- Start date
thcrefugee
Member
stanley blower for 30 bucks.
darookie2000
Member
My blower sounds like a jet engine, even when I put a speed controller on it (don't do this on most blowers, it burns them out, but I needed to reduce power consumption). Get an inline fan if you're worried about noise.
a muffler also.
darookie2000
Member
And a speed controller 
You can drop it as quiet as heat will permit.
You can drop it as quiet as heat will permit.
We need to be careful with words like "inline." It generally refers to centrifugal fans such as Vortex and Elicent. Centrifugal fans sound like a Saturn V at lift-off with the amp set to 11.
If you can put the "inline" behind locked doors where no one ever goes, they can be tamed. If people are allowed in the room, they'll hear and they'll ask. Not a good thing in a stealth operation.
Even the quietest fan makes noise. If you can't pin the noise on a patsy like my freezer, start thinking about masking it with another noise: aquarium, computers, white noise generators. Hide the noise and people will ask what you're hiding. Show them the noise and the noise disappears.
darookie2000
Member
Yeah a speed control on an inline fan might make it tolerable, or an inline booster fan (a good one, not the ones from home depot that sound like the aforementioned launch vehicle - I have two different ones that both rattle like hell).
igrowwitmatches
Member
freezer has the right idea... two of the best fans in his first post and great advice in the second
BLUNToPOTomuss
Member
I have the same size cab, 2x2x4 and I use a activeair 265 blower pushing into a scrubber
It is VIRTUALLY silent! as the scrubber works two fold! one as the scrubber and 2 as a muffler.
It is VIRTUALLY silent! as the scrubber works two fold! one as the scrubber and 2 as a muffler.
If you go with S&P fans it would be wisely recommended that you purchase two of them...one dedicated just to air-cooling the light,the other dedicated to ventilation and scrubbing of odors.
The 6" TD-150 is a good candidate as it can handle some static pressures over the smaller S&P TD fans.
When looking for a fan/filter combo I try to compare to the Can Fan 6" HO and the Can Filter 50.
A Can Fan 6" HO is rated for 392cfm @ 0" static pressure (no ducting or anything attached to the fan) 348cfm @ 0.25" static pressure 301cfm @ 0.5" static pressure 260cfm @ 0.75" static pressure 230cfm @ 1" static pressure 179cfm @ 1.25" static pressure and 139cfm @ 1.5" static pressure.
Now there are two ways to connect a carbon filter to your fan,
1. Filter in the grow room air being pulled through the filter.Or what we'll call scrubbing.
2. Filter outside the grow area setup on the exhuast side of the fan so air is being pushed into the filter.We will call this exhuast.
For scrubbing the Can 50 filter has a max airflow rating (the rating of the fan) is 840cfm and for exhuastthe max cfm rating is 420cfm.The can fan website says that if you add a filter to a fan that does the max airflow of the filter (scrubbing or exhuast) that you can expect a 0.75" pressure drop/staic pressure.
If you match the 6" HO to the can 50 filter effective airflow would be about 300cfm which means with just the fan and filter attached (no ducting or such) that we would see a 0.5" pressure drop.
Now I have never tried an S&P fan but if we get the same pressure drop of 0.5" from matching it to a can 50 filter the at low speed we should have about 105cfm effective airflow,at high speed/full power we should have about 206cfm give or take.
For air-cooling a light and ventilating and scrubbing the grow with one fan you would deffinately want a 6" inline centrifugal fan.
If noise and security are a huge issue I would suggest getting two 6" S&P TD-150 mixed vent fans as stated above,one dedicated to ventilation and odor scrubbing and the other dedicated to just air-cooling your light.
There are things you can do to help silence an inline centrifugal if that is the route you choose.Some things you can do:
1. Build an insulated fan box made out of MDF and some acoustical foam.
2. Use over sized insulated ducting (6" fan gets 8" ducting etc. etc.).see below...
3. Use insulated ducting lol.(helps silence the noise of the air wooshing around in the ducting)
4. Buy or build a duct muffler (they cause no unwanted static pressure/pressure drops) to our ventilation systems.
5. When you attach a carbon filter this will also silence the noise of the air wooshing around.
GL and happy growing.
The 6" TD-150 is a good candidate as it can handle some static pressures over the smaller S&P TD fans.
When looking for a fan/filter combo I try to compare to the Can Fan 6" HO and the Can Filter 50.
A Can Fan 6" HO is rated for 392cfm @ 0" static pressure (no ducting or anything attached to the fan) 348cfm @ 0.25" static pressure 301cfm @ 0.5" static pressure 260cfm @ 0.75" static pressure 230cfm @ 1" static pressure 179cfm @ 1.25" static pressure and 139cfm @ 1.5" static pressure.
Now there are two ways to connect a carbon filter to your fan,
1. Filter in the grow room air being pulled through the filter.Or what we'll call scrubbing.
2. Filter outside the grow area setup on the exhuast side of the fan so air is being pushed into the filter.We will call this exhuast.
For scrubbing the Can 50 filter has a max airflow rating (the rating of the fan) is 840cfm and for exhuastthe max cfm rating is 420cfm.The can fan website says that if you add a filter to a fan that does the max airflow of the filter (scrubbing or exhuast) that you can expect a 0.75" pressure drop/staic pressure.
If you match the 6" HO to the can 50 filter effective airflow would be about 300cfm which means with just the fan and filter attached (no ducting or such) that we would see a 0.5" pressure drop.
Now I have never tried an S&P fan but if we get the same pressure drop of 0.5" from matching it to a can 50 filter the at low speed we should have about 105cfm effective airflow,at high speed/full power we should have about 206cfm give or take.
For air-cooling a light and ventilating and scrubbing the grow with one fan you would deffinately want a 6" inline centrifugal fan.
If noise and security are a huge issue I would suggest getting two 6" S&P TD-150 mixed vent fans as stated above,one dedicated to ventilation and odor scrubbing and the other dedicated to just air-cooling your light.
There are things you can do to help silence an inline centrifugal if that is the route you choose.Some things you can do:
1. Build an insulated fan box made out of MDF and some acoustical foam.
2. Use over sized insulated ducting (6" fan gets 8" ducting etc. etc.).see below...
3. Use insulated ducting lol.(helps silence the noise of the air wooshing around in the ducting)
4. Buy or build a duct muffler (they cause no unwanted static pressure/pressure drops) to our ventilation systems.
5. When you attach a carbon filter this will also silence the noise of the air wooshing around.
GL and happy growing.
