MIVIDE 2-Pack 4-Inch Backdraft Damper Duct – One-Way Airflow Insert for Range Hoods & Vents

Overview

The MIVIDE 2-Pack 4-Inch Backdraft Damper Duct is built to support dependable one-way airflow in a variety of ventilation systems. Designed for ducts used by range hoods, bathroom fans, and kitchen vents, these dampers help manage air movement with a focus on quiet, steady performance. The compact 4 inch diameter is paired with a durable construction that feels solid to the touch and ready for regular use in both homes and light commercial settings.

Key materials and build

• Diameter 100 mm (4 in); length 88 mm; thickness 0.5 mm for a compact profile
• Galvanized steel damper body with a stainless steel axis and spring
• Solid, well-made construction with reliable spring tension for consistent operation

Installation and operation

Install by inserting the damper into the ventilation pipe until it stops. For horizontal runs, keep the spring position horizontal to ensure optimal opening and closing. The damper blades are designed to open only in the direction of the outgoing air, helping maintain a clean air path.

• Smooth-running spring supports automatic opening at low air volumes
• Backflow flap closes to prevent reverse flow when airflow diminishes, helping to keep fumes moving away from occupied spaces

Applications and versatility

These draft blockers are suitable for a wide range of residential and light industrial uses, including exhaust fan pipes, dryer ducts, range hoods, heating ducts, and vents. They offer a practical solution to control airflow without adding noise or complexity.

For best results, confirm the duct size before purchase to ensure a proper fit. MIVIDE delivers sturdy construction and dependable airflow control while remaining straightforward to install and maintain.