Carbon Filter Fan Combo; Get Your Best Carbon Filter Fan Combo. Carbon Filter Fan Combo, Click Here : http://goo.gl/V2Zfv
Overall this is a pretty good filter set. I not too loud, but keep in mind this is a 440 cfm fan. its moving a lot of air so you will hear it. I set mine up the filter in my grow tent and and the fan unit in another room connected with flexible ducting. overall this works well.
I have my fan setup with a variable speed adjuster and so far its been working fine. however if you do this i have found the fan seems to startup better if you power it up at full speed, then switch to variable and dial it down.
Regarding noise levels, using the sound meter on my phone i have measured the noise levels.
In this test i measured the noise of the fan itself from about 1 foot away with the input and output fully ducted out to another room. This is important as if the input or output were in the same spot the fan would be louder.
Fan at full power: 55 dB
Fan at 50% power: 46 dB
Also keep in mind for noise purposes that even if the fan is completely sealed off you will get noise from the air filter input. This means your test will be noisy even if the filter is in the other room. here are some measurements
This is a test of the noise taken in the room with the tent. A few bottom vents open and measure at about 3 feet from the tent. This provides a farly accurate ambient noise level of the tent.
Fan at full power: 48 dB
Fan at 50% power: 39 dB
You can look online to get a reference for these levels. i just wanted to provide these to show that while the fan is quiet.. quiet is a relative term. Overall i have been pretty happy with the unit and it was easy to setup. using 6" flex ducting and some duct tape was all i needed.
My only negative comment is that the mounting bracket could be a bit better. The current design is fine if you want to hang it from the ceiling or top of your tent (if your supports are strong enough) but the design does not allow for a very good vertical mount to a wall for example. other than that its a good low priced unit. http://youtu.be/lCX_z5Zj3Lg
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