What is arrow which way does air filter go in furnace?

When installing a furnace air filter, the correct direction is crucial for optimal performance and air quality.

Generally, the arrow printed on the filter's frame indicates the direction of airflow. You should install the filter so that the arrow points toward the furnace or away from the return air duct.

• The arrow shows the direction air will flow. Place the filter so that the arrow points towards the blower.

• The arrow should point towards the furnace or away from the return air duct.

Here's a breakdown:

• Return Air Duct: This is where unfiltered air enters the system. The filter's arrow should point away from this duct.

• Furnace/Blower Motor: This is where the filtered air is headed. The filter's arrow should point toward the furnace and blower motor.

Incorrect installation can reduce airflow, decrease efficiency, and potentially damage your furnace.

Key subjects with links:

• Arrow
• Airflow
• Return%20Air%20Duct
• Furnace