Renfro
Well-Known Member
Maybe you can google some up. I already know that it's quieter from experience.
Building a silent indoor tent (sketch included), need help with ducting and setup!
Blossom21
Active Member
I would love to see/hear that thing running like from 3-6ft away, how much air is it pushing at the moment. Probably your grow room size would be good to know too, that seem like a one big blower.
Renfro
Well-Known Member
enough to try and turn a 2x4 tent inside out with two high CFM kits installed.
Renfro
Well-Known Member
Increase the duct diameter therefore decreasing the air velocity.
coreywebster
Well-Known Member
https://www.ebay.co.uk/itm/Hydroponics-Silent-6-Inch-150mm-Grow-Tent-Acoustic-Box-Fan-Blower-370m3-h/152871096642?hash=item2397d3d142:g:-e8AAOSw2x1dX5zQ
Apologies , its the 4" that's 23db. 6" is 25db or 26 for higher airflow model. I have a 4" and 6"
The 6" deals with two 3x3 tents with 320w lighting in each and the 4" takes care of the 2x4 tent.
I used to own a £300 silenced fan, that was 50db. Noise bothers me.
Most well known branded fans you can find vids on youtube showing tests on volume and comparisons.
I doubt you will find anything on these but I can record a vid and PM it to you if you need.
One thing, these are quiet but less airflow than some fans of same size so check the airflow in the chart in the link and size accordingly. They do handle ducting very well though.
Oh I linked the one which has the data sheet so you could see the info needed, but you can buy all the sizes even though it may not show, I would suggest gardeners corner over some of the other sellers.
TintEastwood
Well-Known Member
Renfro
Well-Known Member
Yeah, getcha a real fan!
Blossom21
Active Member
So is bigger ducting size worth it when dealing with sound and air pressure? Can you muffle the air flow coming out of the ducting? There's many things i've still would like to know, like what people would do in my place, or what would they change when they see my plan.
I'm interested in the "smooth sided galvanized snap seam ductwork" if that really would be the superior choice, i would want to see it in action before getting ahead of myself. I've read those metal pipes can be a little bit louder than movable ducting, but i realize that might depend on several things like bending and angles.
I'll try to follow the best path and maybe show some results at the end how it all worked out. Literally nothing is set in yet.
Blossom21
Active Member
That should fit right into my 4x4 tent, problem solved guys!
Renfro
Well-Known Member
Short of buying some materials and getting your hands dirty there is nothing that we can show you that has any real world meaning in your situation.
I suggest an oversized vortex blower, a variac speed control, galvanized duct that is upsized, placing the blower mid run and placing the muffler/s near the ends of the duct.
I know that with that setup I wouldn't hear it running if the blower is below 50%.
I suggest an oversized vortex blower, a variac speed control, galvanized duct that is upsized, placing the blower mid run and placing the muffler/s near the ends of the duct.
I know that with that setup I wouldn't hear it running if the blower is below 50%.
Renfro
Well-Known Member
YES! Exactly, with a variac. It would run so silent at about 40% speed it would try and suck your tent inside out.
Blossom21
Active Member
A video would be splendid if you have time to record your fan and ducting at different distances (db meter with you would be icing on the cake, i think smart phones can use those apps to detect sound). At what speed you run your fan at? Seems pretty unbelievable that you could even run those fans so quiet. Never ever seen so low numbers, pretty much all manufacturers tend to lie about their performance.
Psyphish
Well-Known Member
Most of the noise is air movement, I just add another carbon filter to the exhaust side, outside of the tent. That pretty much takes care of the noise. A quiet fan is a must, these types of fans are the quietest I've come across. http://www.canfan.nl/im150410.html
coreywebster
Well-Known Member
I didn't believe the db rating either, I took a punt on them after looking at them a long time and was pleasantly surprised .
Will try and record it this evening.
Blossom21
Active Member
I wonder if could you visualize that for me, i don't know how that would look like in real life. The port in the tent is at 170cm (67") height, i would have to bring the ducting to the ground level and do a loop to the left so the air could exist behind my sofa. I can't imagine a better way to deal with the ducting, there's pretty much no other place to exit it unless i cut it off straight after the tent, but that's not an option because of the sound.
