Air handlers and furnaces aren't often found side by side in West Palm Beach. If you rely on a furnace, you probably shouldn’t need to consider 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 parts to support the heat pump.
A furnace runs in a different way by pushing warm air into your vents, which send it around your residence. Because furnaces rely on combustion chambers to produce heated air, they don't have some of the components you'll spot in a regular air handler.