Deflecto Aluminum Reducer 3" x 4" (Model DIRB43)

Upgrade your HVAC or venting system with the Deflecto Aluminum Reducer. Crafted from premium aluminum with a sleek silver finish, this 3" × 4" adapter ensures seamless connections between different duct sizes, optimizing airflow and enhancing system performance. Whether you’re tackling a home ventilation project or fine‐tuning a commercial exhaust, this compact, lightweight reducer makes installation fast and reliable.

Perfect for dryer vents, bathroom exhausts, range hoods, and general HVAC applications, the Deflecto reducer combines durability with corrosion resistance. Its smooth interior promotes efficient air passage, while the snug fit minimizes leaks and noise.

Key Features

• Fits 3 in. duct to 4 in. duct connections
• Durable, corrosion‐resistant aluminum construction
• Lightweight design for easy handling and installation
• Smooth, rolled edges guard against dents and cuts
• Versatile use in HVAC, dryer, bath, and range vent systems