Diagnosing airflow problems in an HVAC system can be a frustrating and intimidating task. When airflow problems arise without a defined troubleshooting approach, you’ll likely end up guessing at the ...

In 1948, research by R.G. Huebscher established flow resistance for different shapes of ductwork at equal velocities, which allowed the creation of the duct-sizing calculator or “Ductulator” for ...