Furnace Filter Whistle

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Furnace Filter Whistle

Retail $4.49$4.48

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Furnace Filter Whistle - as seen in real simple magazine. A clogged or dirty furnace filter can rob your furnace of energy efficiency. The Furnace Filter Whistle easily attaches to a new furnace filter and sounds when your filter becomes 50% clogged letting you know it is time to replace the filter. The Furnace Filter Whistle is reusable.

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