Service openings shall NOT be made in what type of duct?
Service openings shall NOT be made in what type of duct?
Service openings should not be made in flexible ducts. These ducts are not designed to be accessed easily, and opening them can compromise their structure and functionality. In contrast, metal, duct board, and fibrous glass ducts are more rigid and can accommodate service openings for access and maintenance.
How ans can be metal? Should be flexible
Flexible
Suggest to be flexible
Answer D
Tell me how you access flexible the right way. Metal should not be answer
I believe the question pertains to round metal duct. Can’t cut into that.
How can you trust this site? Even this most basic question is wrong (see ACR, The NADCA Standard - 2021 Edition Section 4.2.9) You are wasting your time here.