Not all HVAC fans are equally efficient; Permanent Split Capacitor (PSC) fans and Electronically Commutated Motor (ECM) fans have substantially different power consumption, so choosing an efficient fan reduces operating cost and energy waste.
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Speaker
JeffEvidence Quote
“not all fans are the same right so there are some permanent split capacitor fans some electrically commutated motor fans they have very different efficiency”
Source
Home Ventilation Advice from HVAC Researcher Jeffrey Siegel: How Many CFM is Ideal?— Home PerformanceCreated: 8/13/2026, 4:55:15 AM
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