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Read our privacy policyThe Supco SPP5 is a two-wire hard start kit designed to boost an HVAC compressor motor's starting torque by up to 300% using a start capacitor and a solid-state PTC relay. You would want this unit installed in your HVAC system because it helps aging or sticking compressors start reliably, solves starting issues caused by low-voltage conditions, and reduces overall electrical strain and breaker trips by shortening the peak power draw when the compressor kicks on.
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