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Can you imagine how many interesting things are hiding inside the ventilation duct in your house? Lost rings, coins, lego parts - it's all there! Not to mention dirt, dust and mold that go from the vents and right into your lungs. This video instructable explains how to build a $30 device that will reveal this world to you.
The video isn't there. Please post a link. Did you copy the embed code right?
Got it! I used the "new youtube embed code" instead of old one. Thank you for letting me know about the problem!!
It's alright! Anytime!

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