Modine’s Atherion packaged ventilation system offers a Coastal Coat Casing Package as a premium option to protect against salt-laden air. This option adds an additional, electrostatically applied polyester powder-coat paint finish to pre-painted G90 galvanized steel. It can withstand a minimum of 5,000 hours of salt spray and fog atmosphere exposure in accordance with ASTM B117 testing. The option also upgrades all exterior casing fasteners from zinc-plated to stainless steel. Modine Mfg. Co.