Heatless
These dryers use a small portion of the dried compressed air to purge the off-line tower
Initial
cost: Low - Operating cost: Moderate to High - Maintenance cost: Low
Heated Purge
These
dryers use less dried compressed air to purge the off line tower than the heatless series
Initial cost: Moderate - Operating cost: Moderately Low - Maintenance
cost: Low

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| Heated Desiccant Dryer-Purge |