Changing your AC filter is a simple process that can improve your indoor air quality and HVAC system efficiency. Here's how to do it:
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Turn off your AC unit: This is crucial for safety. Switch off the unit at the thermostat and ideally at the circuit breaker.
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Locate the filter: The filter is typically located in one of these places:
- In the blower compartment: This is a large metal box usually found in your basement, attic, or utility closet.
- In a wall or ceiling vent: Some systems have a filter grill built into a wall or ceiling.
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Open the filter compartment/grill:
- For blower compartments, there's usually a door or panel you can slide or remove.
- For wall/ceiling vents, there are often clips or screws to release the grill.
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Remove the old filter: Note the direction of the airflow arrow on the old filter. This is important when installing the new one. Dispose of the old filter properly.
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Install the new filter: Make sure the airflow arrow on the new filter points in the same direction as it did on the old filter. This indicates the direction of the airflow through your HVAC system.
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Close the filter compartment/grill: Secure the door, panel, or grill properly.
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Turn your AC unit back on: Switch the unit back on at the circuit breaker (if applicable) and then the thermostat.
Important Considerations:
- Filter Size: Make sure you purchase the correct size filter. You can find the size printed on the old filter. If you don’t have the old filter, measure the opening of the filter slot.
- Filter Type: Different filters offer varying levels of filtration. MERV (Minimum Efficiency Reporting Value) ratings indicate filter efficiency. Higher MERV ratings filter out smaller particles but can restrict airflow. A MERV rating between 8 and 13 is usually sufficient for residential use.
- Frequency: How often you need to change your filter depends on factors like the type of filter, the number of people in your home, and whether you have pets. A general guideline is to change it every 1-3 months.
By changing your AC filter regularly, you can keep your HVAC system running efficiently and improve your indoor air quality.
