Insulated Ducting questions

[VaporBros]

When they advertise the insulated ducting, is it just a wrap or does it actually come with the flexible ducting inside of it? Not sure if I should go out and buy the ducting and some insulation for a DIY job or just order the Insulated Ducting.

Here is a link to what im talking about:
http://www.bghydro.com/BGH/itemdesc.asp?ic=AFADI04X25&eq=&Tp=

Also, im going to be running a 4" Vortex fan. If i mounted a 4" to 6" reducer and used 6" ducting, would that lower the "wooshing" sound of the air passing? Thanks!

 

[Smokerman]

Insulated flex comes complete with insulation wrap around duct.

 

[B420]

The ducting you linked to has the flexible duct already incased in the insulation. And about the 4 to 6 inch lowering the noise from air movement. I can't say for sure but sounds correct to me. Because with the larger duct you wil have more interior volume than the 4 inch fan can fill.

 

[VaporBros]

cool, thanks guys!

 

[Cannabean]

for hotter/louder/heavier duty applications there are insulated ducts with 3" of insulation:
http://www.horticulturesource.com/a...ion=0&osCsid=34edeaf1fce5f69de576d2d382b14723

 

[JohnnyToke]

the insulation around the ducting will help with noise reduction.

JT