This Michigan company says its plate fin coils were specifically designed to meet the needs of hvac markets.

This Michigan company says its plate fin coils were specifically designed to meet the needs of hvac and light industrial markets. Built tough, the Duralite plate fin coils feature standard tube construction of 5/8-in. OD by 0.028-in.-thick copper. The headers are made 0.06-in. to 0.134-in.-thick copper, depending on coil size.

Armstrong International Inc., P.O. Box 408, Three Rivers, MI 49093; (616) 273-1415; fax (616) 273-9057.

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• Armstrong International Inc.