A high-velocity intake louver pulls wind-driven rain into the plenum
High face velocity may need a storm/wind-driven-rain louver, not a basic weather grille. Verify the louver selection against airflow and rain performance requirements.
Stop if this may be a louver selection/face velocity issue. Do you want the submittal reviewed? Watch out Do not blame only caulk when the actual issue is louver selection versus intake velocity/weather exposure. Check Look for water past the louver blades, in filters, or in the plenum. Check the louver model/submittal against face velocity and rain performance. Confirm whether the blade style is drainable/storm-rated. Make sure weeps and sill pan are open. Escalate selection mismatch before repeated water damage occurs. Steps Look for water past the louver blades, in filters, or in the plenum. Check the louver model/submittal against face velocity and rain performance. Confirm whether the blade style is drainable/storm-rated. Make sure weeps and sill pan are open. Escalate selection mismatch before repeated water damage occurs. Say this to your foreman The intake louver at [location] is pulling rain into the plenum under fan operation. I checked the weeps and seal
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