Where is the filter located for all air handlers?

The filter for all air handlers is located in front of the fan. This positioning is essential because placing the filter in front of the fan ensures that all incoming air passes through the filter before it is circulated into the system. By capturing dust, debris, and other particulates before the air enters the fan, the filter helps to maintain indoor air quality and protects the fan and heating/cooling coils from damage and buildup. This placement also facilitates easier access for maintenance and replacement of the filter, ensuring that the air handler operates efficiently and effectively.