Although the two sides of an air filter might look the same, they are not. If you’d examine them with a magnifying glass, you’d find that one side is more porous than the other. … That arrow must always face toward the furnace and away from the return duct that carries the air in need of heating or cooling.
Which side of the air filter face down?
Make the arrows face the ceiling or wall. If your filter is on the ceiling, the arrow should face the ceiling. If your filter is on the wall, the arrow should face the wall.
Does the arrow point up or down on an air filter?
For any air filter, whether it be for an air conditioner or a furnace, the ARROWS ALWAYS POINT IN THE DIRECTION OF AIR FLOW. When you install a new air filter into the AC return duct, the arrows face inward to specify which way the air is flowing.
What happens if I put my air filter in backwards?
By installing your filter backwards, air will have a harder time flowing through the filter and your air handler will have to work harder to make up for the loss of airflow. This could lead to higher utility bills and possibly damage your furnace or air conditioner.
How do I know which way the airflow is on my furnace?
If you are looking at a furnace filter, find the arrow that indicates the proper air flow direction. That arrow must always face toward the furnace and away from the return duct that carries the air in need of heating or cooling.
What is the direction of air flow?
Air always flows from a high-pressure area to a low-pressure area, much like water running downhill. Therefore, without an effective barrier, air outside a home at a higher pressure will always attempt to enter the home.
Which way does the arrow on a furnace filter point?
The arrow points in the direction of the airflow. The point should go toward the inside of the furnace compartment. If the filter goes inside the ductwork, it should point toward the air handler or the furnace.
When replacing pleated filters describe the correct orientation of the filter?
With most pleated filters, the direction of air flow is critical . The dirt should not be accumulating on the metal mesh side of the media; if that is happening, you put it in wrong. Switch it. The mesh side is the back side ; the air should flow through the front side first.