When the filter is not.

Furnace filter air flow direction. Usually, furnaces have multiple arrows stamped into the metal near the filter housing. In addition to clean air, filters also protect your hvac system from debris and dirt buildup. The arrow should face towards your furnace and away from the air duct that supplies your unit with air.

In upflow furnaces, air filter positions at. It’s a good idea to mark the direction of the airflow on your ducts with a sharpie. Your filter slot is almost.

Remember, any heating or cooling system that uses a fan to distribute air is not only blowing air out, but always pulling air back towards it. When you removed the air filter before checking to see what direction the arrow was pointing. To determine the airflow direction in your furnace, all you have to do is look for an arrow on the side of it.

The air is pulled into the ducts from the house through what is referred to as a “return.” the air then passes through the. The arrow and air flow direction to properly insert a new filter, look for the arrow! So, if it is pointing to the left, that.

When the filter is dirty, the furnace efficiency drops because of less air flow. If an air filter is installed in the wrong direction, air will have to pass through the filter via the less porous side. This will make it more difficult for your air handler to keep air flowing.

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. That direction is from the cold air to the hot air duct as the air. The right furnace filter direction allows the filter to effectively trap airborne particles while also reducing the slowdown of air flow through your furnace system.