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Most people never think twice about the small gap under their bedroom door. It’s just there. No big deal, right? Actually… it might be a bigger deal than you realize. That tiny space plays a critical role in something called pressure balance — and when pressure inside your home is off, it can affect airflow,

Matt C.
February 13, 2026

For decades, most furnaces came equipped with PSC (Permanent Split Capacitor) blower motors. These traditional AC motors did their job, but they were notoriously inefficient. As technology and energy standards advanced, HVAC professionals began phasing them out in favor of ECM (Electronically Commutated Motor) and variable-speed DC motors—dramatically improving efficiency, comfort, and cost savings for

Derek N
September 16, 2025