Smoke Pencil


Smoke pencils or air current testers make the air visible. They have evolved from the simple stick of incense.

See: Jason Raddenbach: “Smoke Pencil Puffer Research”
Home Energy, Jan/Feb 2010

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David Butler replied to Don Fugler's discussion joining ducts in the group HVAC
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David Butler replied to Don Fugler's discussion joining ducts in the group HVAC
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Sean Wiens replied to Don Fugler's discussion joining ducts in the group HVAC
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David Butler replied to Don Fugler's discussion joining ducts in the group HVAC
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Welcome Home Performance Forum Members (formerly RESNET BPI - Energy Audit and Home Performance)

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Sean Wiens replied to Don Fugler's discussion joining ducts in the group HVAC
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