Air handlers and furnaces aren't often found in the same home in Winnipeg. If you have a furnace, you likely shouldn’t need to spend time thinking about an air handler.
Air handlers are frequently used with heat pumps and control airflow throughout your residence. Some models also offer backup heating and cooling parts to support the heat pump.
A furnace works in a different manner by sending warm air into your vents, which circulate it throughout your home. Because furnaces use combustion chambers to produce hot air, they don't use some of the pieces you'll see in a regular air handler.