on all orders to the lower 48 states
DuraVent Direct Vent Pro Ceiling Firestop is required for vertical venting where the pipe is passing through multiple floors. Must also be used on any above subsequent floors.
The DuraVent Direct Vent Pro Ceiling Firestop is required when the vent pipe is passing through a second floor when vertical venting. The firestop acts as a shield in the event of a fire to prevent the flames from easily moving through the hole where the pipe is passing through the floor. This is required for each floor above the original ceiling pass through.