SoffitFlow's exceptional durability begins in construction. Each unit is precision-engineered using injection-molded High-density Polyethylene (HDPE), a material known for its strength and resilience. This robust polymer formulation allows SoffitFlow to withstand extreme temperature fluctuations — ranging from -40˚F to 150˚F — without compromising performance or structural integrity. Unlike traditional plastics, HDPE has a significantly higher heat absorption threshold, which helps prevent warping of the damper door, ensuring it continues to operate smoothly, maintaining optimal airflow.

HDPE's impressive list of benefits doesn't end there:
- Lightweight, yet incredibly tough
- Resistant to weathering
- Superior thermal stability
- Unaffected by long term UV exposure
- Excellent moisture barrier properties
In addition to its technical advantages, all SoffitFlow units are proudly made in the USA! You can trust in the quality, engineering and reliability of a product built to meet the highest manufacturing standards.