Astria 10 Pack Rigid Vertical Firestops SV4.5VF-10Astria 10 Pack Rigid Vertical Firestops SV4. 5VF 10 Product Details What advantages do the Astria 10 Pack Rigid Vertical Firestops offer in a direct vent system, particularly regarding fire safety and compliance with ventilation standards? The Astria 10 Pack Rigid Vertical Firestops offers significant advantages in a direct vent system, particularly in fire safety and compliance with ventilation standards. These firestops create a robust fire
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