Rules of thumb, friend, or foe?
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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.
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 there a big difference between R-454B & R32? - December 24, 2025
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- Hey Ed, what install techniques have you changed when installing A2L refrigerants? - December 10, 2025
Posted In: Aside, Technical Tips, Technology
