Window Vent designs on a budget

Mass Medicinals

Mass Medicinals

Well-Known Member
Hi All

Okay starting off with a totally separate question about ducting. Does reducing the size from 6" to 4" do anything to the overall fan system?

Back to the actual question
Does anyone have any experience making a window vent for the exiting growroom air? It looks like we can buy one for the window for $65 dollars. This seems like a pretty steep investment.



We were thinking about a buying wall vent that has the flapping lid:
upload_2017-9-7_9-46-11.png

Then cutting a hole into pink insulation foam that has been sized for the window:upload_2017-9-7_9-51-43.png

And work to ensure it is a proper fit to reduce heat loss from the house. So it ends up looking like a cheap version of this:
upload_2017-9-7_9-53-7.png

Thoughts / suggestions / Pictures would be great!!!

Thanks,
MM's
 
mtndew4lyfe

mtndew4lyfe

Well-Known Member
Yes I've done exactly that to vent my rooms you can use chaulk around both the outside and inside of the board insulation to completely seal it off. I'd also suggest putting a filter on it to keep contamination and smell down. Yes going from 6" to 4" will cause a pressure increase. You can do it, it shouldn't cause any issues, but why not just stick with 6" all the way out?
 
Mass Medicinals

Mass Medicinals

Well-Known Member
Filter: We have one it has not be set-up yet as

Can chaulk be easily removed? We don't want to apply something that is permanent or will damage the window.

We will not reduce the wall vent. The fan is 440 CFM, so we probably shouldn't do anything to increase the suction :)
 
WeedFreak78

WeedFreak78

Well-Known Member
Mass Medicinals said:
Hi All

Okay starting off with a totally separate question about ducting. Does reducing the size from 6" to 4" do anything to the overall fan system?

Back to the actual question
Does anyone have any experience making a window vent for the exiting growroom air? It looks like we can buy one for the window for $65 dollars. This seems like a pretty steep investment.



We were thinking about a buying wall vent that has the flapping lid:
View attachment 4006421

Then cutting a hole into pink insulation foam that has been sized for the window:View attachment 4006423

And work to ensure it is a proper fit to reduce heat loss from the house. So it ends up looking like a cheap version of this:
View attachment 4006424

Thoughts / suggestions / Pictures would be great!!!

Thanks,
MM's
Click to expand...
That exactly how I made a vent for a basement window. I just taped it in place. In a double hung window you could get it to just wedge in if you took your time fitting it.
 
Mass Medicinals

Mass Medicinals

Well-Known Member
Wow so we just tried the fan. Without any ducting attached and on the lowest setting this thing sounds like a small jet engine. The 440 CFM fan is not exactly quiet. :)

We'll try to have pictures tomorrow. Didn't get to the building store today. We were working on plant training and watering still takes FOREVER to mix and administer...
 
stoned-monkey

stoned-monkey

Well-Known Member
amazon has all sorts of vents including the one pictured for less then half that price.
rubber bulb seal like....rubber.jpg

could work and make it easy to remove. also duct insulation(old blanket and tape, the pink stuff like what's in most walls, etc.) can quiet the fan down some, and when it has ducting it will quiet down a little more.
second the filter/screen, if not for smell then for bugs.
6"-4" I have this (the whole in the brick wall was already 4") no problems at all.

a thought pvc or ridged duct that comes out and turns down (keep rain out) with screen/filter attached. cheap and easy.
 
T-Bag

T-Bag

Well-Known Member
moving from 6-4 is going to greatly constrict your airflow... Also window box is the way to go. Use a piece of plywood to cover the window from the inside then cut a 6 inch hole and crack the window and put some blinds in there or frost the window so you cant see in and youre good to go.
 
Mass Medicinals

Mass Medicinals

Well-Known Member
Thanks again for the help. Here is the window vent in all her glory. We went with a foam sealant. This was selected because it is reliable and inexpensive. There are also many products that safely and effectively remove it. All in all it ended up costing a good deal less than the all metal version in the original post.



Happy Growing!!!
MM's
 
T-Bag

T-Bag

Well-Known Member
Nice I like the foam, seems like it seals nice! I need to redo one of mine and make another one in another room. I made one when I first started and needless to say Im a LOT more handy than I was 4 years ago. Its funny looking back at the things I did then, Im sure 4 years from now Ill be saying the same shit hah.
 
Mass Medicinals

Mass Medicinals

Well-Known Member
So we didn't have a drill. Just a 1.5 inch box cutter. So cutting to size and making a circular hole wasn't easy, quick or clean. We also had to take breaks sweeping up the pieces that came off the insulation.

Having those tools will make this much faster and cleaner.
 
T-Bag

T-Bag

Well-Known Member
A knife is the best way to cut that kind of stuff, a drill or saw wouldnt help. Thats why sealant or tape comes in handy.
 
Mass Medicinals

Mass Medicinals

Well-Known Member
We were told to be careful about using knives as the insulation has chemicals. Which then made us a bit paranoid about what we were introducing into the house. We're not crazy but handling things that may cause cancer isn't something we want to do that often. Hindsight we should have cut to size outdoors, and used gloves...
 
T-Bag

T-Bag

Well-Known Member
Yeah you dont want to breath that shit or get it on your skin it will burn... I try to cut everything outside so I dont have to clean it up :P Dont forget tho we are made of chemicals and so are plants. I wouldnt worry, it probably doesnt cause cancer unless your in Cali.
 
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