Short Answer
Halo is designed to maintain the tire at its target cold inflation pressure (CIP). Once the tire reaches that pressure, the system stops adding air. Read this article to learn more about CIP
Detailed Explanation
Halo does not continuously pump air into the tire. Inflation occurs only when tire pressure is below the CIP and the vehicle is moving.
When the tire pressure is below target:
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The inflator adds air while the wheel is rotating
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Pressure increases toward the target CIP
When the tire reaches the target pressure:
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Inflation stops
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The system no longer adds air