Material | Ordered In | Formula | Result | Order Qty |
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Box Vent Calculation Guide:
If calculating from scratch, use: 1 box vent per 300-350 sq ft of attic floor space. Standard code requires 1 sq ft of ventilation per 150 sq ft of attic area, with half at the ridge and half at the eaves.
This calculator is designed to work with EagleView Premium Reports. Always verify calculations before ordering.