Check your current filter. The easiest way to find the size you need is to look at the filter that's already inside of your ...

You do know you are supposed to change your furnace filter don't you? Let me back up a step. You do know your furnace has a ...

lack of airflow will cause the furnace to overheat and shut down. Similarly, a dirty filter can stop an air conditioner because the coils freeze up due to inadequate airflow. Both issues stress ...