Kikerike 2-Pack 4-Inch Backdraft Damper for Ducts | One-Way Airflow Control

Smart airflow control for ducts

Air movement matters as you design comfortable, well-ventilated spaces. The Kikerike 2-Pack 4-Inch Backdraft Dampers combine a rugged galvanized steel housing with durable aluminum leaves to help regulate flow and reduce unwanted recirculation when fans are not running. Built for steady performance in homes, small offices, and light commercial settings, these dampers offer a practical, low-maintenance solution that keeps air moving where you want it most.

What’s included

• Two backdraft dampers with a 4 inch diameter (100 mm) each
• Aluminum flap leaves paired with a galvanized steel housing for lasting durability
• Size confirmation recommended before purchase; dimensions may vary by 1–3 mm

Key features and usage

• One-way airflow design helps prevent unintended recirculation when the system is idle
• Fits into both flexible and non-flexible ducts; not compatible with plastic ducts due to size differences
• Widely applicable across ACs, exhaust fans, range hoods, heating ducts, vents, and similar installations

Installation and practical tips

To install, push the damper into the duct as far as it will go. For optimal operation, keep the spring horizontal when the flap is horizontal; repeat the alignment for vertical installations. Always measure and verify compatibility before proceeding.

Practical benefits in real settings

In everyday use, these dampers offer a straightforward way to support controlled air direction, minimize backflow, and maintain steady ventilation when equipment pauses. They are a sensible accessory option that may contribute to smoother air movement without promising specific outcomes.