100mm accoustic ducting actual

[oldsmoker]

High there everybody, ive tried the search function no luck with that,ok i will be using 4 inch accoustic ductin as noise is a concern on this grow,i know the inner ducting is 102mm or 4inch,but with the insulation on this what size hole would i need to make for ducting to go through, just so thats clear im looking for the exact size of diamteter of 4 inch accoustic ducting :stoned-smilie:,,keeping it green, O.Smoker:bong:

[lambert29]

Can't you get a tape measure and measure it ? Measure the O/D aka outside diameter

[Murdock]

the outside diameter should be 100mm

[VMAX]

100mm is the inside with 25mm of wraping i believe. ive not got any but i guess your looking about 150mm.

[lambert29]

That would be the I/D mate to sit over a 100mm fan... The O/D will be greater cos of the wall thickness of the ducting..... But all he has to do is measure it, if he cant measure the whole thing cos of the shape, all he has to do is measure the wall thickness of the duct and add it on to the I/D. So if the wall thickness is 20mm add it on to the I/D of 102mm = O/D of 122mm .... Sorry to sound like a fucking dick over a piece of ducting lol
the outside diameter should be 100mm

[VMAX]

surely oldsmoker hasnt got it yet so cant measure it?

[Murdock]

yea your right coz the fan is 100mm eh, god i,m stoned lol

[lambert29]

Yeah sorry mate im in the stoned gang with pieman! Dint read it properly... Maybe ther is a spec sheet somewhere..... Or just wait to drill the hole
surely oldsmoker hasnt got it yet so cant measure it?

[VMAX]

yeah me too, i read it 3 more time since,lol.

[Mr Swilly]

Very good question.
Just bought some of this to fit on a 125mm fan.
I had trouble getting it through the top of a secret jardin 120.
It went through , I thnk the vents are 150mm?
It's great stuff the ac ducting. Duct clip the inner onto fan, filter etc. then cover as much as poss of the fan, filter as you can with the foam. It's made a 125rvk very quiet.

[lambert29]

Just looked at a spec sheet from a few manufactures and they seems to be two standard sizes, either 25mm or 50mm wall thickness. So that would be about right swilly if you struggled to get it in, so its got to be 25mm.

[Diddydon]

i would imagine it could be dependent on the brand of the ducting etc.. i´d wait til it comes b4 u start makin holes..

[Icon]

It will squeeze through a 4 Inch hole anyway and will fill out to about a 5.5" if you make a bigger hole but it wont effect flow either way