Capping the unused vent offers several safety advantages: Prevents accidental use: It stops anyone, including future tenants or homeowners, from mistakenly connecting a new vented dryer to the inactive vent This can help prevent potential fire hazards. Protects all parties involved: Capping the vent safeguards the homeowner’s association, property manager, and appliance installer from any liability if someone unknowingly used the old vent system improperly. By following these steps, you can ensure the safety of your home and avoid potential complications in the future.