crablab, never assume.
Your assumption could be just as hazardous as the difficulties in taking predetermined positions as clearly outlined in #62.
What if the issue relates to the composition of duct materials, temperature or sensitivity to humidity, deterioration with component age, ...
The problem requires a scientific approach; establish a viable theory, gather information to test the theory, and repeat for a range of circumstances; unfortunately we are lacking in all areas.
With problems, people are most valuable in helping to solve them; however when a problem is a mess, the problem is with the people.
Last edited by safetypee; 23rd Dec 2016 at 15:14.
Reason: Typo