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Current Sensing Relay Aprilaire #51

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Aprilaire #51 current sensing relay Simplifies air cleaner installation on furnaces without accessory terminals. Can also be used to simplify installation of inline duct booster fans Voltage Range: 100-125 VAC, 50-60 Hz Sensing Current: Minimum of 4.0 Amps AirFilters.com This Aprilaire #51 current sensing relay (minimum of 4 amps) has a voltage Range of 100-125 VAC, 50-60 Hz, and simplifies air cleaner installation on furnaces without accessory terminals. It also works for HoneywellA(R) HE220, HE225, HE260, HE265, HE360 and HE365 humidifiers.