1、DB11/T1979-2021ContentsI General provisions.2TemS23 Basic requirement.44 Material.54.1 Exhaust duct.54.2 Fire resisting check damper74.3 Guiding device.84.4R0ofC0wl.85 Design105.1 General requirement.105.2 System.105.3 Exhaust duct.125.4 Air inlet.135.5 Reflux prevention measures145.6 Cowl ventilato
2、r.145.7 Exhaust equipment.166 Construction.176.1 General requirement.176.2 Receiving inspection.186.3 Exhaust duct installation.206.4 Cowl ventilator installation.216.5 Fireproof check valve installation.227Test and acceptance.237.I General requirement237.2Aerodynamic property test.237.3 System acce
3、ptance.24Appendix A Acceptence records for residential exhaust system.27Appendix B Fire resistance test method for residential exhaust34Appendix C Residential exhaust system air-leakage test.38Appendix D Residential exhaust system air dynamic property test.40Appendix E Wind resistance test for cowl ventilator.43Explanation of wording in this standard.45List of quoted standards.46Addition:Explanation of provisions.47
