Marine Duty installations require reliability, low maintenance, long life, corrosion resistance, heavy duty construction, and the flow and pressure capability in a compact package all required come together in our marine duty fans. Our Marine Duty Fans and Blowers are constructed to meet or exceed U.S. Coast Guard and U.S. Maritime Administration Standards. Sizes from 12" to 60" with CFM from 1,154 to 91,864 at free air and up to 3" SP.