noise

Hello, decided to ask here if people could give some good ideas how to plan air conditioning right to achieve silent opetaration (trying to as far below as i can from 40dB). I'm currently building a 4x4 tent setup right near my bed, so it really has to be even quieter than the the average setup...

What's happenin' - I'm in a bit of a pickle - I have to utilize a bedroom for my 2 tents (4×8 & 3×3), and the house is small w.o a basement. I have 3 hyper fans (2) 6" (lights/exhaust) & (1) 8" (4×8 exhaust) and multiple hurricane wall mounts. Not to mention (2) 1000w ballasts, cobs/led etc. I...

6 inch PVC pipe. Connect to end of ducting run. Quietens the vortex by a huge amount. Dummied up pics on the work bench.

Here is my dilemma: I have a 30 cubic foot tent (3x2x5), a 4" 190cfm fan and filter and I will never grow more than 2 plants at a time. so in theory, this fan and filter recirculates the air in my tent approx 6 times a minute (30x6=180). This damn fan is loud. the air coming out of it is damn...

Hello all, I have two brand new nanolux og series 600w ballasts and when they are running there is a very loud high pitch. They are both plugged into the same power bar (i will try changing the power bar but don't think that will make a difference) Both are running at 100% output (options of...