soler & palau TD-150 6" fan review... fairly quiet, but far from silent

hazey grapes

Well-Known Member
it gets the job done! at full speed, it moves air like a miniature jet engine.

it wasn't as quiet as i'd hoped though. i was hoping to be able to turn it down low enough as to be virtually silent. that ain't ever gonna happen! at low speed, it sounds kind of like a hair dryer on low, though maybe not quite as loud. it starts howling though at full speed.

i bought a speed controller figuring that i could get it even quieter than the low setting, but found out it didn't help much as once you turn it down to a certain point, wind noise becomes replaced by a loud humming noise loudest when the fan is barely moving. i wasn't expecting that, but dayton fans do that too and maybe even louder.

on the lowest speed where hum starts overtaking wind noise, it moves enough air to keep at least one 400w light cool to the touch and when you wrap it up in heavy cloth, it gets a little quieter. i eventually got it quiet enough so that i couldn't hear it running when i closed the door to my room which was what i was after. i'd expect that a muffler would help alot and let one run higher speeds and tune some hum out. i think i'll either make one or even buy one though at over $100, they aren't cheap for what amounts to a tin tube inside another, but it's worth it keeping a low profile.

i REALLY like the easy to move shape and the built in platform that lets it rest flat where a dayton would tip over. i didn't know that it came unwired, but it was nothing to take an old lamp cord and screw it in to the sockets.

i think that it DOES run a little quieter than a dayton, but not as dead silent as i'd hoped for, but i guess that's what happens when you run a giant vacuum cleaner in your room. in that regard, the thing sucks. even at the lowest speed, it will suck your hand if you cover the intake.

i wish they made a version that used a lower RPM motor whose top speed is the equivalent of this one's low so that you could dial down even more without the hum problem. i'm still annoyed about that, but it happens with regular fans too. they're made to move a lot of air, not be silent. as long as i can keep my room cool without making noise to draw nosy neighbors into my biz, i'm happy. for just a little more noise than when i was using a box fan on low to push air through my lights, i'm moving about 10x or more air. if a muffler works well, i could move even more air and possibly even quieter too with less hum.
 

iamaaror

Well-Known Member
Is that the TD 150 or the TD 150S?

The "S" model is their silent model. I'm looking for one right now...
I have that one, the silent 5 inch model. The fan itself is silent, the air movement is not and I haven't been able to find a way to quieten it down. Maybe acoustic ducting would help, but it's quiet enough that I can sleep with the tent 2 foot away from my head, it's just white noise. The 6 inch fan inside my tent actually makes more noise.
 
I have that one, the silent 5 inch model. The fan itself is silent, the air movement is not and I haven't been able to find a way to quieten it down. Maybe acoustic ducting would help, but it's quiet enough that I can sleep with the tent 2 foot away from my head, it's just white noise. The 6 inch fan inside my tent actually makes more noise.
That's good to know because I'm sleeping near my tent as well. Did u buy yours online?
 

hazey grapes

Well-Known Member
with mine cranked down to about 70%, i could barely notice it a couple feet away from me watching TV or across the hall in my room. sleeping near one wouldn't be a problem, but running one full blast and not having your neighbors know isn't going to happen. if you dial the fan down the noise is low enough that a neighbor shouldn't hear anything unless your walls are paper thin.

i bet getting an exhaust muffler helps. i wrapped my fan with a bunch of clothes which helped as the fan doesn't heat up when covered and i made rough "mufflers" more to direct the air out of the room than dampen noise really and used a couple scraps of mattress liner in the ducts sometimes because it made opening & closing the door easier.

you could easily make a muffler out of cardboard rolled into a tube with egg crate mattress liner foam inside to work like a muffler. if someone could do wood working or didn't mind cutting a lot of cardbard, you could make an even better muffler where the inner chamber is series of donut hole shaped chambers about the inner diameter of your plumbing and maybe an inch inside the outer diameter of your muffler for sound waves to dissipate in like one type of silencer. if you live near a junkyard, you could DIY something using actual mufflers.

i know when you obstruct the airflow on the exit of an S&P fan, that quiets them down a bit too, though it speeds the air exiting up.

i imagine you could also make a simplified series of staggered baffles along the same lines as the silencer method, but in a zig zag alternating layout to dissipate sound waves with the additional dampening of the mass of the wood. if you didn't glue cardboard layers together properly in the first design, the cardboard might resonate. i've seen that happen especially when a freestanding sheet touches a hose with air rushing through.

it would be cool if someone made a heavy steel fan with precision bearings and a metal impeller and a silent low RPM motor for the ultimate in stealth. slowing everything down in a fan, silencing motor hum and dampening resonances would help gardeners with nosy neighbors a lot and all neighbors seem to have snoot trouble.

unless you invest in an insulated duct system with fans in your attic maybe, you're never going to get full silent light/room cooling. all i know is those big dayton fans howl like banshees at speed.
 
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