February 2021

USA Coil & Air has been marketing our patented, freeze-damage water and steam coil line for over 25 years under the name Sentry Guard™. Sentry Guard™ is a one-of-a-kind invention that guarantees that any water or steam coil will not have freeze damage during a freeze event. What is a "freeze event"? Freeze events occur when chilled water, hot water, or steam heating coil has liquid in...

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