What is the difference between class 0 duct and class 1 duct

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Reference no: EM131374281

1. What standard covers ductboard and methods of connecting and sealing ductboard?

2. What standard covers flexible duct and methods of connecting and sealing flexible duct?

3. What is the difference between Class 0 duct and Class 1 duct?

Reference no: EM131374281

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