Air handlers and furnaces aren't often found in the same home in West Palm Beach. If you use a furnace, you most likely shouldn’t need to spend time thinking about an air handler.
Air handlers are often used with heat pumps and deliver airflow around your house. Some systems also provide extra heating and cooling pieces to support the heat pump.
A furnace runs in a different way by pushing heated air into your vents, which move it across your house. As furnaces rely on combustion chambers to create heated air, they don't have some of the pieces you'll see in a regular air handler.