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 ...
What friction rate should we use when designing a residential duct system? is 0.1” of water column safe? When it comes to understanding friction rate in residential ductwork design, Allison Bailes III ...