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Furnace Whistle

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  • Furnace Filter Whistle
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    Niagara Conservation®

    Furnace Filter Whistle

    This Furnace Filter Whistle easily attaches to a new furnace filter and sounds when your filter becomes 50% clogged letting you know when it is time to replace the filter. Having a cleaner furnace filter can help a furnace be more energy efficient This...

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    $4.99
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