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2022 International Fuel Gas Code Ifgc Chapter 5 Chimneys And Vents 503 8 Venting System Terminal Clearances
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Square Horizontal Termination Cap 4 Inch X 6 Direct Vent Pipe
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Ifgc chapter 5 chimneys and vents gas fireplace direct vent termination venting explained heat square horizontal cap 4 clearances clearance flue exterior lp technical