Why heat pumps are common in this part of Florida
A heat pump does not make heat by burning fuel. It moves heat from the surrounding air into the pool. That is efficient when the air is already mild, which is most of the year in Lee County. On a rare cold night the unit will heat more slowly, and some models have a low-air cutout. If you mainly swim on weekends or want a fast heat-up for guests, a gas heater, or a heat pump paired with gas or solar, may be a better fit. Compare options in heat pump vs. gas.
What an install needs
Most residential pool heat pumps need a dedicated 220-volt circuit, a level pad with enough airflow around the unit, and a plumbing loop at the equipment pad. An older pad built for a small gas heater may need more space or a new electrical run. A contractor should confirm panel capacity and clearances before you order a unit.
Care in a coastal climate
Coils and cabinets last longer when the unit is kept clear of debris, rinsed of salt spray as the manufacturer allows, and serviced if airflow or performance drops. Typical service life is often in the 10-to-15-year range, not a guarantee. See how long pool heaters last.