My cold-smoker set-up. The firebox is a 14″ Weber charcoal grill ($29 from Home Depot). The smoking chamber is from an old water smoker, with a 3″ hole drilled to its side using a Harbor Freight electric power drill fitted with a bi-metal hole drill-bit, also from Harbor Freight. The smoke conduit is an 8-ft long, 3″-diameter semi-flexible aluminum heating duct (from Lowe’s). It is really easy to make — took me less than 30 minutes. Make sure you wear safety gargles when drilling sheet metal.
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DIY Cold Smoker Setup
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