![Furnace Filter Whistle](/wp-content/uploads/Furnace-Whistle-2-200x0-c-default.png 200w,/wp-content/uploads/Furnace-Whistle-2-300x0-c-default.png 300w,/wp-content/uploads/Furnace-Whistle-2-400x0-c-default.png 400w,/wp-content/uploads/Furnace-Whistle-2-500x0-c-default.png 500w,/wp-content/uploads/Furnace-Whistle-2-600x0-c-default.png 600w)
Furnace Filter Whistle
Our filter whistle easily attaches to a new furnace or air conditioner 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. Individually packaged with simple use instructions.
Specifications | Approximately 2" in diameter. |
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Features | Promotes Better Energy Efficiency. |
Keep the heat inside!
• Winterize your home • Save energy • Stay alert when filter needs changing
![Keep the heat inside!](/wp-content/uploads/furnace-whistle-400x400-c-default.jpg 400w,/wp-content/uploads/furnace-whistle-500x500-c-default.jpg 500w,/wp-content/uploads/furnace-whistle-600x600-c-default.jpg 600w)