Air handlers and furnaces aren't often found in the same home in Windsor. If you rely on a furnace, you most likely don't need to think about an air handler.
Air handlers are frequently linked with heat pumps and control airflow around your house. Some units also have secondary heating and cooling components to assist the heat pump.
A furnace runs differently by sending warm air into your vents, which send it across your house. As furnaces rely on combustion chambers to create heated air, they don't need some of the pieces you'll see in a standard air handler.