On the new filter, find the arrow indicating the proper airflow direction. 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.

Does it matter if furnace filter is backwards?

When a furnace filter is placed backwards, the fibers can’t do their job properly. This means your furnace has to work harder to generate the same air flow, resulting in increased energy costs. Particles are also allowed to build up irregularly, making the furnace working even harder to draw air.

Which side of the air filter face down?





If your filter is on the wall, the arrow should face the wall. Does your filter not have an arrow on it? First check again as nearly all filters do have it, likely in the corner of one of the sides. If it does not have an arrow though, you’ll want the side with the wire-frame to be facing outward.

Does it matter which way a furnace filter face?

Quote from the video:
Quote from Youtube video: You know there's an air flows indicator on here and what you want to do is just remember this is the furnaces filter. And that arrow always points towards the furnace. So you could be in a basement

How do I know which way the airflow is on my furnace?

Quote from the video:
Quote from Youtube video: So you're going to use your airflow arrows will be pointed towards the furnace like this the other thing you could do is if your furnace was running in heating or cooling mode.

Should air filter arrow point up or down?

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 air filter backwards?





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 you know which way the air flow is to install the filter?

Quote from the video:
Quote from Youtube video: Hi this is Jess with West Michigan air duct and HVAC. I want to talk to you about replacing your furnace air filter. Once you having a filter look on the side of it and you'll always find an arrow

What does the arrow mean on a furnace filter?

Not every furnace filter has an arrow stamped on its side, but when you do see it, it indicates which direction the filter has to face. It always points to the direction of the furnace’s air handler or blower compartment.

Which side of furnace filter should be dirty?

In all cases, the furnace filter should be dirty on the side that the air comes into the furnace from. If your air filters are dirty in some other fashion, it is likely your furnace is not working properly, or the filter was installed incorrectly.

How often should you change your furnace filter in the winter?



Which way does the airflow arrow point on my furnace filter ยท

Why are furnace filters directional?

The right furnace filter direction is necessary to effectively trap airborne particles. Set it aside after removing the old filter and grab your new filter. Check along the cardboard edges of the filter for an arrow. The arrow will indicate the air flow direction through your heating and cooling system.

What is the correct way to put an air filter in?

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.

Which side of furnace filter should be dirty?



In all cases, the furnace filter should be dirty on the side that the air comes into the furnace from. If your air filters are dirty in some other fashion, it is likely your furnace is not working properly, or the filter was installed incorrectly.

Why is my furnace filter dirty on both sides?

Your filter gets clogged faster when your furnace is running more often. That’s because more air is cycled through your filter when your furnace goes through more heating cycles, so more contaminants get caught on the filter’s media. The colder it gets outside, the faster your filter will get clogged with dirt.