24 X 12 X 6 Square No Flange Loft Vent

https://onyxxteriors.com/info/explore/e-custom-vent-24x12x6-rectangle-no-flange.php

The 5 1/2 inch depth of this vent allows for a full 2 1/2 inch spacing.

Allowing for better airflow with less restriction.

Boxed out for crawlspace ventilation.

Design your Rectangular Gable Vent to your specifications.