[Editor’s note: When we last visited with lead installer John and his helper Charlie (in the June 11 issue), they had learned how to measure external static pressure on a new system they had just ...
GET IT RIGHT: Duct fitting construction has a large influence on its equivalent length and which air duct calculator setting you choose. The fitting on the left has a much higher equivalent length due ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback