Never worked with duct before - is it ok to shorten the duct in the tent?

[The123321]

I am looking at the 32x32 tent with the ac infinity 6" fan with carbon filter on it. I would likely have the fan with the filter at the top of the back of the tent with filter then fan then duct to exhaust right out the top hole in the tent that is under a wire shelf with the meanwell driver for the led quantum board to have air from tent point at bottom of driver which means I do not need duct once it gets out of that hole. I only need like 1 foot of duct if even that to go out from the fan then angle it up to go out of the hole in the top of the tent. I looked for insulated duct but it is expensive on there.

https://www.amazon.com/AC-Infinity-Heavy-Duty-Four-Layer-Ventilation/dp/B07WNK7N7F/

I found this ac infinity duct that is 8 feet long and is some of the shortest I have found. I know that duct does compress. Do you think that 8 foot long duct would work for what I need or would I need to cut it? Is it ok to cut that duct or would it fall apart if you do that? What do you recommend on there? Would insulated duct make a big difference in noise for only that 1 foot of duct that I need on there?

Would a duct elbow work instead of duct on there? It looks like would be all I would need to point the air from the fan up out of the hole at the top of the tent on there.

 

[I'mback]

I do it all the time. AAMOF I could not find a 6" damper, so I made my own. Can't see what it looks like (can't find the pic) The damper (12 inches) was fabricated from a 3 ft of 6" ducting. Here it is installed.

 

[The123321]

Thanks. Do you think the metal duct elbow would work? It is less expensive than the duct and I would likely need to cut the duct down to the size of the metal duct elbow anyway on there. Would the metal duct elbow have less noise or the same or more on there?

 

[I'mback]

If you can use solid ducting, then use it. Those ribs ducts (as pictured) produce turbulent vice laminar flow. e.g not as smooth = drop in fan capacity. I didn't have a choice, or else it would have been solid ducting to outdoors.

 

[The123321]

Thanks. I think I may try it on there.

 

[f-e]

You might find a plastic 90 bend is a little cheaper than a metal one. But only metal ones tend to come as long bends. You probably need a long one, with it's extended legs, to reach out the tent, not just point in that direction.

Long pressed 150mm 90 elbow

 

[SuperBadGrower]

You don't need solid pieces for an air system that small. I used a setup like that many times. Just guide the exhaust duct thru the top hole and tighten the rope on it. Yes you can cut ducting. On the inside is a spiral of wire that will mess up scissors so use something better for that.

 

[I'mback]

You don't need solid pieces for an air system that small. I used a setup like that many times. Just guide the exhaust duct thru the top hole and tighten the rope on it. Yes you can cut ducting. On the inside is a spiral of wire that will mess up scissors so use something better for that.

Duh!

He's talking about solid ducting here, not the corrugated type which, a set of side cutter does wonderfully well on "that wire" and a knive looks after the rest!!!

 

[f-e]

Duh!

He's talking about solid ducting here, not the corrugated type which, a set of side cutter does wonderfully well on "that wire" and a knive looks after the rest!!!

The OP linked to flex, as what they wanted to shorten. But they have found their need for a short bit, might be better served with a solid elbow, for price reasons.

The solid will flow better, and reduce noise. The gain in flow might go unseen, but the noise reduction will be good.

A typical 90 won't have long enough legs to reach the roof. As a result, a bit of rolled up card might be employed. The best item is a long bend but the price for these lesser used items might rule them out


Edit: Looking at this again, the tent isn't big enough for a fan&filter assembly, even using a short bend.

 

[I'mback]

Duh! My bad I never clicked the link. Sorry Superbadgrower

 

[SuperBadGrower]

O no problem dude, I envisioned something like this, maybe I am wrong too

^ Very simple system for tents
and if OP want to use something like that, just one pice of duct is all you'll need.

edit are you sure it is too small, f-e? I could fit the 1x1m system in even a 70x70cm tent. but those CF take up only 25 cm (10 inches). I'm sure OP selected some gear that fits, hopefully

 

[f-e]

You got a 1m system in a 70cm tent?
I must to be far gone to be posting this evening.

 

[SuperBadGrower]

Well, I didn't write it very well hehe. But I mean that the things I used for 1x1m also would fit in small tents.

 

[f-e]

I'm still trying to comprehend inches. It's certainly in the 70-75cm area somewhere.

As if by magic, a short carbon and 6" have appeared. 60cm. Leaving 15 for the duct. If the tent's sock was right up against the wall that might work. But it won't be. It will be a couple of inches in. So the duct is coming back over the fan a bit. Flexi might be the only option, if all the other constraints can't be changed

 

[The123321]

Thanks. Can I put the tent sock from the top hole directly onto the exhaust of the fan without the duct or elbow on there? The fan exhaust will be right under the hole in the top of the tent on there.

 

[The123321]

The tent is only 32x32. I do not have much room in there. I looked in it and it looks like I may not be able to do filter > fan > exhaust due to not having enough room to do it in 1 straight line to the exhaust. I may have to do filter > duct > fan > exhaust with the filter pointed one way then an right angle to the fan then a right angle elbow up into the exhaust hole. Do you think that will work on there?