Air handlers and furnaces aren't often used in the same home in Savannah. If you rely on a furnace, you probably shouldn’t need to spend time thinking about an air handler.
Air handlers are often linked with heat pumps and manage airflow around your house. Some units also have secondary heating and cooling parts to assist the heat pump.
A furnace heats in a different way by sending hot air into your vents, which send it throughout your residence. Since furnaces rely on combustion chambers to make hot air, they don't have some of the pieces you'll find in a regular air handler.