For Integrity Only
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| 1. Apply frame collars on the steel duct
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| 2. Apply boards to frame collars
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| 3. Construct penetration seal
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Integrity & Insulation
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| 1. Apply frame collars on the steel duct
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| 2. Apply mineral wool between framing
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| 3. Apply boards to frame collars
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| 4. Construct penetration seal
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back...
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