stealthy window ventilation

Hey guys this is one of my first posts here but I finally have a question I haven't been able to answer on my own. I recently purchased a high velocity fan for my yieldmaster 2 shielded hood.

My question is how can I vent through my window while still being stealthy?

At the moment I have a square shaped ducting cap sitting snugly in the open with open airway above. It works great but when I stand in the back yard it looks bad and is rather loud.

I live in a suburban area with a busy road behind my house (window resides on this wall).

I am just curious if you guys have any ideas on how to possibly make something so you can't see or hear the vent.

Thank you for any feed back.

i think some people use foam speaker grill material on their windows. that will hide anything you have on your window and still allow you to push/pull air through. its a black foamy type material you buy in squares and cut up to the proper size.

any hot air being pushed out your window will be noticed by FLIR (forward looking infrared) devices used by cops (equipped on helicopters but also available in hand-held devices). so keep that in mind.

to reduce noise consider using insulated ducting + duct muffler. you can also hang your fan with bungee cords, and if you want it even more silent, build a box for it (out of plywood for example) and line the inside with Dynamat.

Ahh I didn't even think of speaker padding. I think I can figure something out with that. As for the flir idk if I will have much of a problem I have my medical card and 3 little ladies with a 600 hps. Or should I still consider venting elsewhere?
Im game for anything I just don't really want to have to put any holes in the walls.

what I do i purchase this high density foam covered with foil from home depot it ciomes in 5x10 sections I believe.....10 bucks roughly

-I then take a sheet and tightly and neatly cover the board
-then a smaller piece of foam I put the same fabric or sheet to cover it except this piece is recessed as far out to the window as you can, kissing the screen essentially( this piece should be secured to the top of the window leaving 60% of the bottom of the screen visible from outside and 40% covered with the appearence of a drape or sheet hanging
-then larger foam should be bigger then the window and cover it from the inside. ....... this will give you about a 4 inch gap between the 2 foam boards.
-the vent hole should be hidden from the outside blocked by 40% covered foam board you placed close to the screen

the over all appearence from outside should seem like a sheet or drape covering neatly over a window with a runner up top actually making it look nice.

it is 100% stealth and have grown in apartments for years.


It may be hard to pick up what i am putting down. so I drew this up for you... hope it helps rofl im stoned so don't mind me





edit.... the reason for the sheet tight and neat is cuz the 75 mph wind can blow stuff around if you dont staple it nice and tight.

Lol I smell what you're steppin in bro. I like the idea tho im gonna definitely check out home depot tomorrow and see if I can get some foam. Thanks

What I did was cut a plywood piece, screwed ducting onto it, painted the outside of it black, attached black screen via a hot glue gun, and voila!

hollow out a window A/C unit and duct it into that.