How to intake from a window whilst keeping it hidden

What i did, was i crack my window just like a half inch. Then i bought a 4x8 sheet of foam insulation. You know, the stuff that has foil on one side. I cut it to fit perfectly snug in the window sill. Then o took some spray glue and sprayed it on the cut piece of styrofoam and i glued a big piece of cardboard to it. Then i cut a 4" hole with a hole saw, and i spray glued a 4" metal flange to the cardboard. Then i set the foam and cardboard in the window sill, and i cut the cardboard all around the outside of the window trim so it was nice and neat. Then i took some velcro and i stuck it all around the window trim with the glue exposed. Then i fitted the foam and cardboard into the sill and pressed all around to adhere the velcro to the window trim and the cardboard. Now i have a 4" intake on a tear away totally light sealed window insert that i can easily remove and put back at my convenience. I can mount a dryer hose on it and add a 4" little computer case type fan to it and have a intake. Or you can just have it passively intake. I passive intake cuz in winder it can get to 50 blow celcius here! Another way, when we used to do big illegal grows, we'd have a open window. a 2x4 frame was screwed to the wall and a sheet of plywood was screwed to it. Then more 2x4 framing and another sheet of plywood with the opening opposite. See we were creating light baffles by doing that 3 or 4 times. Then a large box fan was placed in a cut out in the plywood and it would draw in fresh air.

I cut some plywood, painted it, used a hole saw and inserted a molding to connect the duct. Wedged it into window and cut a dowel to secure it fairly tight. A blackout curtain large enugh to wrap around the vent etc... I went a step further at that time. i lined the inside of the window sill with some insulation and then tacked up some cardboard with a hole cut out for the ducting on top of that. if you want a fan in the window, that is more difficult.. a baffle is teh only options.. some sort of maze for light... this significantly reduces air flow. Need at least 2? --------- | | --------- if that retains shape... kinda shows the light has to weave through the 'light maze'. 2 walls overlapping slightly inside a box. That may not do 100%... maybe you need 3 walls to weave around? ------------------------ Think it is easier to just use an inline duct fan and put soem bends in the ducting. then you don't have airflow to contend with at the window and easy enough to blackout.

I had the same type of blinds,{INSIDE} i used 5x6 styrofoam{spray painted black}curtain panels and a straight curtain rod. cut hole the size of ducting in the styrofoam on the end you desire,lower top window{bottom if best} insert styrofoam and close window{seal if you want with tape or foam spray} Hang straight curtain rod{3-4 inches longer on each side of window frame} and hang curtain panels and put ducting in strofoam hole halfway thru.. OUTSIDE: For my screen I use a Sunguard Solar Screen. No one can see inside but you can see out and it will conceal the window and all behind screen Since the blinds are vertical i removed the 1st panel over the hole to insert ducting and the curtain panels and solar screen keeps it private and un-noticeable. I dont know how to show with pics. Its similar to what LetsGrowSome explained.Good Luck and Happy Growing.

You could get a white board and some window seal. Cut it to fit and put seal around outer edges of board. Put it in the window with it open. Lower the window down snuggly onto board. Then lower the blinds down to where window meets board. That's how I have mine. The blinds don't move at all. People use similar setup with an a/c unit intake for house, so it can be played off easily. Best of luck! Happy Growing!

They describe a clever stealth exhaust design on here: https://www.growweedeasy.com/stealthy-exhaust-systems-for-indoor-plants Though for an intake, I would probably just use a window fan like this to pull fresh air into the room. Comfort Zone CZ319WT 9" Twin Window Fan with Reversible Airflow Control, Auto-Locking Expanders and 2-Speed Fan Switch, White https://a.co/d/2PmnpKL

Minha ideia 2 tábuas colocar cortina no meio de 2 tábuas, apertar uma contra outra, cortinha presa. Agora apertar na 3 tábua que vai tapar janela 👍🤛🤞