The Centrotherm AE DBox Air Restrictor Ring is designed to fine-tune airflow within Air Excellent distribution boxes, helping achieve precise balance across your HRV/ERV ventilation system. By adjusting individual duct flow, it supports consistent indoor air quality and system efficiency.
Made from durable, high-quality materials, the restrictor ring is quick to install and built for long-term reliability. It’s an essential accessory for ensuring your high-performance ventilation system operates as intended.
Sold 10 per carton.
FeaturesFits Air Excellent distribution boxes (DBox series)
Allows precise airflow balancing
Supports system efficiency and comfort
Durable construction for long service life
Easy installation and adjustment