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1. Differential Pressure Measurement Method
- Establish pressure difference – air pushed through vent at constant pressure.
- Measure resulting airflow rate to calculate permeability.
- Ensures vent meets required ventilation standards.
2. Flow Rate Detection Technique
- Specialized flow sensors – directly measure air movement through the membrane.
- Reads exact volume of air passing per minute.
- Provides clear indication of breathability performance.
3. Simulated Environmental Testing
- Programmable environmental chamber – simulates extreme temperatures and humidity.
- Ensures membrane does not freeze, warp, or lose airflow efficiency.
- Validates performance under harsh real‑world conditions.
4. Long‑Term Durability Assessment
- Rigorous stress and aging tests – continuous vibration or repeated pressure cycles.
- Confirms breathability does not degrade over time.
- Ensures internal structure remains intact throughout expected lifespan.