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Unkown white powder found in duct downstream of HEPA!
Have you tried using demineralized water in your humidification system? I had this problem several years ago as a maintenance manager at a university. We had very hard water on campus. We used water softeners on our water system but had to go to distilled water to eliminate the fine white...- tbrght
- Post #5
- Forum: HVAC/R engineering
