Available Colors: Black & Brown
Automatic foundation vent that opens and closes based on temperature using a bi-metal coil
Opens at approximately 70°F and closes at around 40°F to regulate airflow into crawlspaces
Durable plastic housing with integrated honeycomb grill
No mortar required for installation — attaches using included screws, anchors, or retaining clips
Helps control moisture, mold, rot, and foundation issues by ventilating crawlspaces
Fits rough opening: 8 in × 16 in
Net Free Area (NFA): approximately 50–65 sq. in.
Color / Model Designations:
RABL – Black
RABR – Brown
Overall dimensions: approximately 9.5 in × 17 in
Lightweight and easy to handle for single-person installation
Self-regulating — no need for seasonal manual adjustments
Helps maintain dry, well-ventilated crawlspaces
Quick, tool-friendly installation
Designed to fit standard foundation vent openings
Ensure foundation opening is properly sized (8 × 16)
Periodically check the vent mechanism to ensure proper operation
Suitable for both new construction and replacement applications