Frequent question: Why do air filters have a direction?

Air filters have arrows printed on the sides of them that show you which way they are supposed to be installed. These arrows should be pointing in the direction that air flows through your system, which is away from the supply ducts and (typically) toward the blower.

What happens if you put 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.

Does it matter what direction air filter goes?

The arrow must face toward the furnace and away from the return duct that pulls the air in need of heating or cooling. It’s smart to draw the airflow direction arrow with a permanent marker on the furnace or ductwork. … The arrow on the filter should always point toward the furnace.

Which way should the Arrow face on an air filter?

The arrow on your filter should always face the unit and away from the return air duct that carries the air that will be heated or cooled. HVAC systems push the cool or warm air out and pull spent air in, recirculating the air throughout your home.

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What happens if you put the cabin air filter the wrong way?

If you set your filter up backwards, the normally collective end of the device will not face the air supply. In effect, your filter will help keep debris in the air. This results in a clogged filter and improperly cleaned air when it reaches your lungs.

How do I know which way the air flows in my AC?

Generally the edge of the filter is marked with an arrow which points in the direction of the airflow. In other words, the air travels from the tail of the arrow toward its point. If there is no arrow, the side that is stronger or reinforced by cardboard or wire mesh is the side the arrow should be pointing to.

Does the arrow point up or down on an air filter?

Air filters have arrows printed on the sides of them that show you which way they are supposed to be installed. These arrows should be pointing in the direction that air flows through your system, which is away from the supply ducts and (typically) toward the blower.

Which side of air filter goes up?

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.

Which side of HEPA filter faces out?

The side that feels smoother is the side where dirty air enters. On this side, there are a lot of fluffy hairs used to capture the pollutant particles. The rougher side is where clean air blows out. The side to be installed is indicated on the Smart Air filters so just follow what is said.

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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.