I just had a question about wither I got the right flexible ducting for my media room. I got the ducting that home depot sells as it's one of the few places I could find it & also a couple HVAC company's said that the same stuff they use. It's made by Dundas Jafine . If this is not the right stuff where's the best place to find it, also I'm in near Vancouver, B.C. Canada so local places would be best. Also the hot air exhaust is up top & the cold air intake is near the ceiling too, is this the best setup or should I place the cold air intake low on the wall? Sorry about the picture quality, it's was from my cell phone :o

Yup, it is fine.

For HTs, it is generally recommended the intake be located up high as it will draw off more hot air and help keep the air circulated a little more efficiently.

All flex insulated duct is not created equal. I used the HD brand before I discovered that there is an even better version. This product has an acoustically transparent fabric membrane that allows the fiberglass insulation to act as an absorber. The net result is less sound propagated down the length of the duct. The HD brands have plastic, mylar or foil membranes.

http://www.flexmasterusa.com/Portals/0/6B.jpg

product 6b here:

http://www.flexmasterusa.com/ProductGallery/FabricDuctInsulated/tabid/67/Default.aspx

I'd be a little worried about the fiberglass getting blown through the duct with that setup.

Tom, the fiberglass never has access to the air path. No fiberglass is able to pass through the inner liner

Good to know. Thanks, Ted. I'll have to try this then, that is, if I can find it locally. Has anyone ordered it online?

Has anyone order it online?

Good question.

The HD stuff I have is a plastic polyester core & I can't seem to find anything else in my area. Would this stuff work if I put I couple of S bends in the line.
I know it's compromise but it's got to be better then the standard metal ducting ? Here's a link to the MFG. website (http://www.dundasjafine.com/products/27-insulated/74-insulated-air-connector-black-jacket-residential.html)

At this point I can't really wait for anything else to come in from the USA as I've taken a weeks vacation starting today to get my drywall up & finished.
Is this stuff going to be a major problem (weak point ?) as I've already got the whisper clips up & will be putting three layers of DW up so I don't want to be redoing this anytime soon.

Mach, as long as you have a lot of insulation (that you add) around the flex, you'll be OK

Ted -

I have two runs of the 8" plastic lined flex running across my theater area in 12" oc joists that doesn't really leave any additional room for insulation. Any thoughts on just how bad this might be? The rest of the room is clipped, isolated, insulated and will (eventually) be DD+GG.

The insulation is what's doing the work. The amount of insulation on the actual Flex is R-5 to R-8... not going to cut it.

I would suggest tearing or teasing off thinner layers of fiberglass from a roll and incorporating into the soffit as best as you can.

That's the plan as the old ceiling & walls were just DW, so I have added lot's of pink & or roxul insulation to help with the noise control. The multiple layers of DW I'm putting up will do most of the noise control but I don't wanna screw it the other bits before the DW goes up as I can't afford to make to many mistakes

... I have added lot's of pink & or roxul insulation to help with the noise control.

Don't pack or compress much...

Ok, I'll see what I can do before closing in.

Thanks again for all your help!

I'll post pics soon before the drywall goes up just so I can have you guys have a look over to make sure I don't miss anything :D

Don't pack or compress much...

I totally second this thought....it needs to stay fluffy or it won't act much like insulation.

People have a tendency to think that more is better. R13 in walls and R19 in the ceiling is plenty for our purposes.

I used R19 around my flex ducts but I also had big soffits and literally wrapped it loosely around the ducting. It expands to fill all the gaps over time so don't compress it.