The answer to 'air handler vs' is that an air handler and a furnace are both important components of a central HVAC system, but they serve different functions. An air handler is the indoor unit that circulates air through the ductwork, while a furnace is the heating component that warms the air. Air handlers are typically used in central air conditioning systems or heat pump systems, while furnaces are used in forced-air heating systems. The choice between an air handler or furnace depends on your home's heating and cooling needs, the type of HVAC system installed, and your budget.
Air handlers are generally more energy-efficient than furnaces, as they use fans to circulate air rather than generating heat. They also tend to be quieter and take up less space. Furnaces, on the other hand, provide direct heat and may be a better choice for homes in colder climates. The cost of an air handler versus a furnace can vary significantly depending on factors like size, features, and brand, but air handlers are typically more expensive upfront.