To change a filter in your system, one needs to follow the below-written steps:
To turn off the air conditioner or heater, use the thermostat.
Remember to notice the arrows' direction on the filter's border as removing the old filter.
Insert the new filter so that the arrows point the same way as the old one.
The arrows should point in the direction in which the air is moving.
The arrows on a ceiling-mounted filter should point up.
The arrows on a filter adjacent to a blower should typically point towards the blower.