Permit-ready single-zone HVAC design for a 2,900 sq. ft. coastal home in Vero Beach, Florida. Precisely calculated via Manual J, S, and D around a 5-ton Trane split heat pump (1,817 CFM), the plan efficiently manages high regional humidity by countering a 46,439 Btuh peak summer load (11,771 Btuh latent capacity) and a 33,952 Btuh winter heat loss. The seamless layout integrates complete whole-house duct routing, performance schedules, and code-compliant fresh air ventilation specifications.