Mineral Scale Chemistry in Humidifiers
When water evaporates into an HVAC airstream, only pure H2O vapor enters the air; all dissolved mineral solids (calcium carbonate, magnesium, iron) remain on the aluminum evaporative panel. Over 60 to 90 days of operation, this mineral buildup hardens into brittle scale that restricts bypass airflow.
Never scrub an evaporative pad with vinegar or harsh chemicals; doing so strips the absorbent ceramic clay coating. Replace the water panel annually at the start of each heating season.
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Sizing measurements, static pressure curves, and filtration ratings referenced across our educational guides are compiled from published ANSI/ASHRAE Standard 52.2 engineering data, AHAM AC-1 verified ratings, and manufacturer technical documentation. ClariSelect provides objective editorial research and analysis with zero sponsored placements.