On Apr 3, 6:44 pm, "vic" wrote:
I will be installing a 16' run of 3.25 x 10" galvanized duct work
near the ceiling of my kitchen which will eventually be covered by a
chase I will build around it.

I want to make the run secure and prevent any possible vent noise
rattling when I use the range hood fan.

Try as you might you may find that your vent fans will be noisy
anyway. It is the fan itself and the actual air movement that makes
noise, not the ducting so much.

The best solution I have seen for noise reduction is to put the fan
outside. So long as the fan is in the room it will be noisy
regardless of what you do with the vent. Of course some fans are less
noisy than others.

Does each section of stack have to be screwed together with machine
screws or will the metal ducting tape suffice??

You need screws in my opinion. Tape is fine but who knows how well it
holds up inside an enclosed chase?

How is each 5' stack of ductwork secured to the plasterboard wall??
Thanks for your help!

So long as it is attached at the hood and attached where it leaves the
house and all the stacks are screwed to each other then I see no
reason to fasten it to the wall.