Flood Vent Design — Florida

Under FEMA's NFIP regulations and the Florida Building Code, enclosures below elevated buildings in AE zones must have flood vents with a minimum net open area of 1 square inch per square foot of enclosed area. The vents must be located on at least two walls and must be positioned to allow flood waters to enter and exit the enclosure from multiple directions. Flood vents can be engineered vents (certified to provide a specific net open area per FEMA's certification program) or non-engineered vents (standard vents that must meet the 1 sq in per sq ft requirement). Engineered vents can provide more net open area per vent, allowing fewer vents to be installed.

Flood vent design must consider: the total enclosed area (to calculate the required net open area), the location and number of vents (to ensure flood waters can enter and exit from multiple directions), the vent type (engineered or non-engineered), and the structural impact of the vent openings on the enclosure walls. Pineland Engineering designs flood vent systems that meet FEMA requirements and are integrated into the architectural design of the enclosure.