Rules of thumb, friend, or foe?

Find out why HVAC technicians’ rules of thumb must be based on math, not something made up or convenient, from ACCA HVAC expert Ed Janowiak.

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Ed Janowiak

Manager of HVAC Design Education at ACCA

Ed Janowiak is ACCA's Manager of HVAC Design Education and can be reached at ed.janowiak@acca.org or 703-824-8878.

Latest posts by Ed Janowiak (see all)

• Hey Ed, Is It Better to Size up or Down When It Comes to Ductwork? - May 3, 2023
• Hey Ed, Do You Like Your Ducts Kinky? - April 26, 2023
• Hey Ed, What Is the Most Appropriate Velocity Moving Across a Filter Grill? - April 19, 2023