there is a arrow on the side of the filter.When u put the filter in ,the arrow should point in toward the grill or if it is a filter rack it should face the air handler hope this helps.
| May 30, 2010
Plumbing & HVAC Maintenance : How to Determine the Air Flow Direction for a Furnace Filter
It's important to determine the airflow direction for a furnace filter so that it works properly, and installation simply requires setting up ...
Basic Home Improvements : How to Install Air Filters
To install an air filter, remove the used air filter, make sure the new filter is facing the right direction, mark the date on the side of the ...
