request contact oilon oy. . This company is located in finland. you can get is touch with mr. pasi aaltonen.
web site is www.oilon.com.You can also find e mail address form am link.
Hello
I need help in the following
1- A rule of thumb in calculating the external static pressure for supply and return air ducts
2- Web sites that have a detailed but easy to apply and user friendly methods in calculating external static pressure
I have tried the methods in ASHRAE and...