Air handlers and furnaces aren't usually installed in the same home in Longmont. If you have a furnace, you most likely shouldn’t need to spend time thinking about an air handler.
Air handlers are typically paired with heat pumps and manage airflow across your home. Some units also provide backup heating and cooling parts to assist the heat pump.
A furnace works in a different manner by blowing warm air into your vents, which move it across your residence. Because furnaces use combustion chambers to make heated air, they don't need some of the components you'll find in a standard air handler.