When Portland, Maine needed an aluminum fire/rescue boat, the city brought on builder A.F. Theriault & Son. The resulting 65-ft City of Portland features a medical bay identical to land-based ambulances, multiple water cannons and a complete Delta T ventilation system. "We offer Delta T Systems as optional equipment, but they have such a great reputation that many architects will incorporate them into their designs," said Theriault & Son VP of production Graham Oakley. The new Portland Fire Department fire/rescue boat will serve the city…