Are these worth it? Do they "REALLY" do the job?

I found some links to silencers for duct lines. I've also seen on here where you can build a silencer "box", but I don't have that kind of room. Anyone have any experience as to whether these "silencers" work and if they're worth it? There is a pic below, but here are the links for the silencers... http://www.energyfederation.org/consume ... 86_744_680 http://www.rewci.com/8siforroduld.html http://www.johnlsayers.com/phpBB2/viewt ... &start=270 http://www.acousticalsurfaces.com/hvac/ ... n.htm?d=26 http://www.airhand.com/product.asp?Cate ... tegoryID=0 I also included a pic of where I want to put the silencers and a pic of the dimensions from the air handler etc. I have NO access to the supply trunk, but do have access where the flexduct lines branch off the trunk. Thanx!

camistan wrote:

I found some links to silencers for duct lines. I've also seen on here where you can build a silencer "box", but I don't have that kind of room. Anyone have any experience as to whether these "silencers" work and if they're worth it?

Cami, They sure do work.......... and in an amazing way - but you pay for that technology through the nose. They're extremely efficient - but also quite costly. If you are at one end of those talking normally - and a friend of yours has his ear up to the other end - to him you're whispering........ and he's only a foot and a half from you........... Is that working good enough? Sincerely, Rod

Are they effective in the low end though? :roll: If they are... Maybe I'll have to price them. I'm planning to build thick, beefy silencers, but that's one aspect of my build that I'm really not looking forward to... :roll: ...There will be a lot of carpentry involved, and I don't really have the ideal tools for that kind of work around here... --Keith :mrgreen:

Maybe some large car, or rather, truck mufflers/resonators can approach the same effect.... and cheaper?