AIRHEAD: When your measured airflow is ±10 percent of design airflow, you can confidently proclaim that your duct design method works. May 27, 2019 The duct system is one of the most important ...

Chauncey grew up on a farm in rural northern California. At 18 he ran away and saw the world with a backpack and a credit card, discovering that the true value of any point or mile is the experience ...

For the past 50 years, engineers have been “designing” duct systems. Quite often, they were not actually designing the systems, but were sizing duct the duct according to some rule of thumb. The rules ...