installing a genuine 2521301S is the only way to restore the equipment to its original AFUE rating and factory performance standards

Can I use this 40VA transformer if my original part was rated for 30VA

Automatic Recovery: The auto-reset feature eliminates the need for manual resets after temporary high-limit conditions

As the direct replacement for the legacy Bard 5651-094

Tamper Resistance: The screwdriver slot adjustment reduces nuisance calls by deterring end-user tampering with critical thermal settings

ZoneFirst ZDS-30X10 Damper 30067439-890 installing a genuine 2521301S isThe ZoneFirst ZDS 30X10 is a heavy duty rectangular zone damper designed for professional HVAC airflow management. Built with a sturdy extruded aluminum frame and parallel blades, this side mount damper is engineered for insertion into the 10 inch side of a 30" x 10" duct. It features a high torque 24VAC synchronous motor (Model MSS) that operates in a power closed spring return open configuration, ensuring a fail safe open position during power loss