Air handlers and furnaces aren't often found together in Edmonton. If you have a furnace, you probably won’t need to spend time thinking about an air handler.
Air handlers are often paired with heat pumps and deliver airflow across your home. Some systems also provide backup heating and cooling pieces to assist the heat pump.
A furnace works in a different way by blowing warm air into your vents, which move it throughout your house. Since furnaces rely on combustion chambers to produce heated air, they don't need some of the parts you'll spot in a regular air handler.