The air filter’s metal mesh should face the blower in the hvac unit.

Furnace filter air flow direction. If an air filter is installed in the wrong direction, air will have to pass through the filter via the less porous side. Furnace filters remove the airborne dirt particles from the air when the furnace is running. In most furnaces, the filter will be adjacent to the furnace and is inserted where the ductwork meets the furnace.

If the filter is in the wall or ceiling, then the mesh should face the inside of the wall or ceiling. It absorbs air from the bottom or sides of the machine after that air gets heated in the heat exchanger and flows upwards in the house’s ductwork. The arrow on your filter should always face the unit and away from the return air duct that.

When the filter is not. 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.

Pushing air (cool or heated) in, and pulling spent air back in for another cycle. Determine where on the furnace you can find the filter air box. To determine the airflow direction in your furnace, all you have to do is look for an arrow on the side of it.

The arrows point in the direction of the airflow. To determine air flow direction hold a thin strip of paper in front of the duct while it is operating and see which direction the paper is pulled or blown. Step 2 examine the filter.

It’s a good idea to mark the direction of the airflow on your ducts with a sharpie. In addition to clean air, filters also protect your hvac system from debris and dirt buildup. The air is pulled into the ducts from the house through what is referred to as a “return.” the air then passes through the.