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Do not operate the tower unattended. Remote sensors and alarms may be installed to monitor tower conditions.
Do not operate the tower without a heat load. Basin heaters may be used to keep the water in the tower pan at an above-freezing temperature. Heat trace ("heating tape") is a resistive heating element that is installed along water pipes to prevent freezing in cold climates .
Maintain design water flow rate over the tower fill.
Manipulate or reduce airflow to maintain water temperature above freezing point
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