Thats a deadly idea dude, thanks.

A good way to keep noise down is to build an air baffle, Especially if your exhausting/in taking from a window this will pretty much kill any motor, or duct tubing sound. basically, build a wooden box from 5/8" Plywood using the same dimensions as the window sil, then cut at least one piece small enough to fit inside the box, with a 2 inch opening opposite od where your fan enters.

Something like this.

One Baffle (See through Top down view)

Window
________
|
| ________|

Fan


Double Baffle (See through Top down view)

Window
________ _
| ________|
|_______ _|

Fan

So you would build this then tape around the outside to seal it, also make sure u have a sheet or curtain between to baffle and the window, and whenever possible never attach a fan directly to the baffle, this transfer motor harmonics to the outside and you'll hear sound outside, always try to use a duct in between the blower and a baffle. These are great for basement windows.

Cool that is very good info man!

I bought my 6" duct booster fan at Menards for $30 It was pretty noisy, so I bought a dimmer switch for lights and turned the speed down to a resonable level that can barly be heard! But you do lose CFM's slowing down the fan!

Rope smoker

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http://-rope-smokers-2nd-cfl-closet.html:

dyno-mat , we used to use it in our cars back in the day to help keep in the bass, also kept loose parts from rattling

build another box ????????????

hello to all,
I am new to growing MJ, actually i havent started yet, my background is commercialy growing cut flowers. it seems that every picture of mj farms i have seen a huge amout of fans moving air through the growing area.

my question is why does mj need so much air movement?

To force the plants to strengthen their stalks, but also to prevent molds, and to keep the warmth even.

nice, i think ill be making one of these

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If you have anything that sets on the ground or a shelf, you can make silicon rubber footies for the equipment. Just get a 2"x2"x4" tupperware container. Coat it with Pam, and fill it with clear silicon caulking from Lowes. Knock it out of the container after 12 hours. Let cure for 5 days, then place 4 under each balast, fan, or whatever. You can also use these when bolting something to the wall as a bolt dampener. This cut down vibrations in my attic from the point of not being able to sleep to forgetting I had a grow room

insulated flexible ducting works wonders too. Its takes up more room but it does wonders for sound suppression