Humidity Load and Run Time
Largo's core sits three miles and more from the intracoastal, so humidity does the damage here, not salt. A long cooling season working through 1950s to 1970s duct systems shows up as weak airflow and clammy rooms, and only the streets farthest west, out by Ridgecrest and Walsingham get close enough to the water for corrosion to enter the conversation.
