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We are sometimes asked if our HPH plastic composite J Hooks are certified safe for air handling (plenum) spaces.

The simple answer is YES.

HPH J Hooks have been tested and found to be in compliance with all UL criteria for support of conduit, tubing and cable (UL 2239). This includes compliance with UL 2043. UL 2043 is the standard for fire testing, which includes heat and visible smoke release of products installed in air handling spaces. Our certificate of compliance from UL is attached. The report includes the following paragraph: