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 furnace?

Stand in front of the furnace and look for the ducts. Pull the old filter out and discard it. 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.

Which way does air flow through a vent?

The Arrow and Air Flow Direction



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 you put a furnace air filter in 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.

Does furnace filter direction matter?

So be sure to look for the arrows that are printed on the sides of the filters because they show you which way the filters are supposed to be installed. 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 faces out?

Quote from the video:
Quote from Youtube video: And. As you can see the filter I have arrow pointing up right. So just put the arrow up towards the ceiling. If you have a whole unit. Just let the arrow point towards the wall and put it in.

Which way should airflow arrow point?

Position the airflow arrow so that it points in the direction the air is flowing. In addition to clean air, filters also protect your HVAC system from debris and dirt buildup. The airflow arrow should point towards the furnace/blower motor to collect harmful particles before it reaches the furnace’s equipment.

Why is there barely any air coming out of vents?

A fan clogged by dirt, a stuck wheel, broken motor, or a loose fan belt are all common problems that reduce the amount of airflow you feel coming from your vents.