Duct work set up

Chrissa

Well-Known Member
Got a pretty shit situation the only room I can put my tent in is 25 feet away from winow and the room the tent is in gets blistering hot in the summer .. so this is what I've come up with mind u I've ran the exact same setup without the portable ac and the 220cfm fan but everything else was the same and worked like I charm during the winter months just the summer is crazy hot so I got the ac but again the window is 25 feet away
 

Chrissa

Well-Known Member
Thanks do u think it will exaust properly though do I need another fan somewhere or is the correct fan placement right
 

a senile fungus

Well-Known Member
I'm thinking you'll want to get a second blower. One would be inside the room scrubbing the air with the carbon filter, however many cfms required for your scrubber.

The other blower needs to be on a separate ductwork circuit, carrying air over the cool tube and exhausting the portable a.c. as well. You could pull air from outside, filter it for bugs and stuff (not carbon filter), through the cool tube to pick up heat, and back outside it goes, along with ac exhaust.

The problem with your drawing is that you are moving the air conditioned air out of the room. Expensive.

I've never run a cooltube, but I'm pretty sure they need to be on a separate duct line if you're going to be using a.c. in the room, or else you're just wasting $ on ac...

You need more opinions lol

Oh I see that you have two blowers, cool. I think they'll need to be separate, but you should confirm this.
 

Chrissa

Well-Known Member
The filter and cool tube are in a tent everything else is outside the tent in the room is be using the ac to cool the room outside the tent and the hose from the ac is only to exaust hot air does this change anything
 

Chrissa

Well-Known Member
OK so this is the current set up before the ac was purchased but in the summer months the room my passive intake took air from was to hot therfore making my tent even hotter with a 1000w running so I bought an ac only problem is I can't run anymore ductwork out I need to somehow vent everything out of the one 25 foot duct where do I put the fan for the best efficiency is my question Screenshot_2017-01-16-00-05-31.png


What I came up with is the next photo cooling the room my tent intakes from rather than cooling inside the tent itself but using the same exaust duct as I cannot install a second one!.. in the next image is this suitable will the 440 cfm fan be able to exaust out to the window still or does it need to be at the window itself pulling the entire duct line or do I install like the pic but add an additional booster fan at the window to aid in exausting the long duct run Screenshot_2017-01-16-00-32-47.png
 

visajoe1

Well-Known Member
skip the booster fan by the y-joint. the a/c unit pushing the hot air out and the 440cfm fan is plenty to pull it and the air from your tent. Put the booster at the end, by the window if you can. Thats a long run though, you may need to upgrade that booster fan to another 440. Try it your way first though, you can always upgrade it if you need more cfm. Keep the ducting bends smooth, and joints clean/sealed.

Where are you running the ducting? The ceiling? Above the ceiling?

I hope noise isnt an issue
 

Chrissa

Well-Known Member
The 25 foot ducting has alleady been run and used for a couple grows the 440 cfm fan is in a soundproof box with Pyle audio sound reducing foam and held together my screws and sound reducing caulking compound the 25 feet of ducting is insulated as well it is running up along side the rafters in the ceiling the ceiling is unfinished in this part of my house in the basement..noise isn't an issue I'm legal where I am but It can b a nuisance that is y I origany constructed the fan box..hope this explains better
 

coreywebster

Well-Known Member
I see you have passive intake in the tent itself but how much intake do you have in the room the tent is in? Your fans are only going to be able to draw out air that is been replaced in the room by one method or another. So do you have air bricks or vents in the main room? Is there gaps between the supporting joists or gaps in the floor boards above for air to be drawn in. If the room is sealed then all the fans in the world aren't going to help, they will just create a slight negative pressure and be overworked.
 

Chrissa

Well-Known Member
I see you have passive intake in the tent itself but how much intake do you have in the room the tent is in? Your fans are only going to be able to draw out air that is been replaced in the room by one method or another. So do you have air bricks or vents in the main room? Is there gaps between the supporting joists or gaps in the floor boards above for air to be drawn in. If the room is sealed then all the fans in the world aren't going to help, they will just create a slight negative pressure and be overworked.
The room is not sealed at all there gaps through the supporting joists and a hvac duct which supplys air but not enough to effectively cool the room
 

coreywebster

Well-Known Member
Cool, seems like your plans should work and the ac will help obviously. With 25 feet a booster near the window should keep that air flowing.
 

Gquebed

Well-Known Member
If you have w 6" duct lines tying into a "y" and a 6" duct line coming out of that youre going to severely restrict your exhast. Youll need a bigger line coming out of that "y" .

In fact, the y itself will have to have two 6" openings and at least an 8" on the third. Be better if it was 10 or 12.
 
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