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.
Which way should my air filter face?
To properly insert a new filter, look for the arrow! 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.
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.
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.
Does the arrow go up or down on an air filter?
The arrow on the filter should always point toward the furnace. The furnace or the filter air box most likely will contain the correct filter measurements for replacement filters or just check the filter itself.
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.
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.
What is the direction of air flow?
Air flows forward, and it gets pushed around by whatever is in its way. Air always flows from the high pressure region to the low pressure region. A warmer place is usually a low pressure region while a colder place is a high pressure region. Thus the direction of air is from warmer to colder region.