Large duct penetration

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Solids for the most part expand when heated and contract when cooled. There are many other concerns that need to be addressed when it comes to ducts containing dampers. The next step is to install firestop sealant to the appropriate depth. Also, many of the larger firestopping manufacturers have highly qualified technical personnel who can explain the subtle nuances of firestopping, as well as skilled field personnel who can conduct more specific training. Molded ABS Cover UV and ozone resistant, crowned to shed water, reinforcing ribs to counteract snow loads and integral counterflashing with drip edge to direct water away from flashings.

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The average insulation contractor may be faced with situations where he or she needs to firestop HVAC duct penetrations through fire-rated walls.

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Improving Firestopping for HVAC Duct Penetrations in Fire-Rated Walls

It does not stop there, however. Some HVAC ducts are being protected with proprietary high-temperature duct wraps to resist the spread of fire from compartment to compartment without the aid of fire dampers. Conclusion The evolution of firestopping has led to significant improvements over traditional methods. Because of the nature of thin sheet metal ductwork and the physics that come into play during the course of a fire, additional steps are required to ensure that such penetrants are properly protected. Since round HVAC ducts do not deflect, they are relatively easy to firestop. Also, many of the larger firestopping manufacturers have highly qualified technical personnel who can explain the subtle nuances of firestopping, as well as skilled field personnel who can conduct more specific training.

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