- Versatile Compatibility: Our 3 to 6 inch Duct Adapter is essential for any Vent HVAC system, enabling seamless connections between ventilation ducts of varying sizes: 3.14'', 3.93'', 4.72'', 4.92'', and 5.90'' (80 – 100 – 120 – 125 – 150 mm). It functions effectively as both a reducer and an increaser. - Durable Material: Constructed from high-quality plastic, this duct adapter is built to endure temperature variations and resist corrosion. It is robust enough to meet the demands of air conditioning, heating, and cooling systems, with an operating temperature range of 0°C to 90°C. - Easy Installation: Our Universal Reducer Increaser Connector simplifies the installation process. Just connect it to your chosen duct size, whether you are reducing or increasing, and effortlessly integrate it into your ventilation system. This quick setup saves both time and effort. - Efficient Airflow Control: The innovative design of this duct inline reducer increaser connector allows for optimal airflow management. Adjust airflow easily to meet your heating, cooling, or air circulation needs, resulting in improved air distribution and comfort in your space, while enhancing energy efficiency. Use Cases: 1. Ideal for retrofitting existing ventilation systems to accommodate different duct sizes, ensuring compatibility and effective airflow. 2. Perfect for new HVAC installations, allowing flexibility in connecting various duct sizes for tailored climate control. 3. Great for DIY home improvement projects, enabling simple upgrades to air circulation systems for enhanced comfort.