Furnace filter whistle - $5

condition: new

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- Reusable whistle
- When the filter begins to get clogged it will start to make a whistling sound
- Helps keep filter clean and reduce cost of energy
- https://www.youtube.com/watch?v=Ja5KKUiJyuA&ab_channel=AMConservationGroup

post id: 7895000738

posted: 2025-11-11 02:58

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Furnace filter whistle - household items - by owner - craigslist

- Reusable whistle - When the filter begins to get clogged it will start to make a whistling sound - Helps keep filter clean and reduce cost of energy -...