Soem details on Ducting

[smpsmp45]

http://www.latenightengineer.com/duct-standards.html

[Brian_UK]

How did you find these documents amongst all of the website postage data ? ;)

[Josip]

Hi, smpsmp45 :)

thanks, a lot of interesting info...need time to read all...some links are not active...unfortunately..

Best regards, Josip :)

[smpsmp45]

I have realisd that aciently you come across such links.