• Turn off the furnace: Shut off the power to the furnace. You can do this at the thermostat by setting it to "off," or by flipping the circuit breaker or a dedicated power switch, often found on or near the furnace itself. 
• Locate the filter: Find the filter housing. It is usually in the air return ductwork before the air enters the furnace, or at the entrance to the blower chamber. 
• Remove the old filter: Open the filter's access panel or door. Slide the old filter out, being mindful that it may be dirty. Note the direction of the arrow on the old filter, which indicates the airflow direction. 
• Insert the new filter: Take the new filter and check for an arrow on its side. Slide the new filter into the slot, ensuring the arrow points in the same direction as the old one—towards the furnace and away from the return air duct. 
• Finish up: Close and secure the filter compartment door or panel. Restore power to the furnace by turning the switch back on or flipping the breaker. The furnace should now be running with the new filter in place. 

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Describe the item or answer the question so that site visitors who are interested get more information. You can emphasize this text with bullets, italics or bold, and add links.

Describe the item or answer the question so that site visitors who are interested get more information. You can emphasize this text with bullets, italics or bold, and add links.

Describe the item or answer the question so that site visitors who are interested get more information. You can emphasize this text with bullets, italics or bold, and add links.

Describe the item or answer the question so that site visitors who are interested get more information. You can emphasize this text with bullets, italics or bold, and add links.

Describe the item or answer the question so that site visitors who are interested get more information. You can emphasize this text with bullets, italics or bold, and add links.

Describe the item or answer the question so that site visitors who are interested get more information. You can emphasize this text with bullets, italics or bold, and add links.

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