Automatically Protect Vulnerable Openings from Floods

Passively protects your above and below grade openings.

Vent Shaft Flood Control System in Action:

Custom designed.

We install custom-designed Vent Shaft passive louver systems. The pictured system was designed and installed to protect subway tunnel shafts. These shafts vent air as the subway train passes through the tunnel. When flood water rises, the louvers close in sections as needed protecting the critical tunnel infrastructure from flooding. Over 30 units are installed and working as intended. More installations are scheduled.

Vent shaft passive louver system
Passive flood protection for above grade openings
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Passive flood protection for above grade openings - i.e. generators, fan plants
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Installed behind or over existing gratings - inset or surface mounted
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Designed for minimal airflow disruption
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A series of buoyant louvered panels, enclosed within an aluminum box & shelf structure
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Proven effective in many projects
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An elegant way to handle the structural loads imposed by the floodwater
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Custom sized to fit the opening - protection to required flood elevation
Diagram of buoyant louvered panels
Vent shaft system up close
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Floodwater "floats" the panel into position
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Wiper seals stop the water from going around the panel edges
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Only panels affected by the water will raise, leaving much of the opening intact in "minor" flood events
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The shelves will each drain through - no additional drainage is needed