Air handlers and furnaces aren't often installed in the same home in Daytona Beach. If you use a furnace, you probably won’t need to spend time thinking about an air handler.
Air handlers are usually paired with heat pumps and manage airflow throughout your home. Some systems also have secondary heating and cooling pieces to support the heat pump.
A furnace heats differently by sending hot air into your vents, which move it across your home. Since furnaces depend on combustion chambers to produce warmth, they don't need some of the parts you'll find in a regular air handler.