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how often should I change my furnace filter

HVAC

The answer to 'how often should I change my furnace filter' is that you should typically change your furnace filter every 1-3 months, depending on factors like the type of filter, the size of your home, and how much the system is used. Changing the filter regularly is important to maintain optimal airflow and efficiency, as well as improve indoor air quality.

Dirty filters can restrict airflow, causing your HVAC system to work harder and use more energy. They can also allow more dust and allergens to circulate through your home. Most manufacturers recommend changing standard pleated filters every 1-3 months, but you may need to change them more often if you have pets, a large household, or live in an area with a lot of airborne particles.

Sources

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ENERGY STAR• authority
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Step-by-Step Guide

  1. 1

    Locate the furnace filter

    The filter is typically located in the air return duct or the blower compartment of your furnace.

  2. 2

    Turn off the power to the furnace

    Make sure to shut off power to the furnace before attempting to change the filter, either at the circuit breaker or using the power switch on the unit.

  3. 3

    Remove the old filter

    Carefully pull out the old filter and note the size and orientation so you can replace it with the correct new filter.

  4. 4

    Install the new filter

    Insert the new filter, making sure it is oriented correctly based on the airflow direction indicated on the filter.

  5. 5

    Turn the power back on

    Restore power to the furnace and turn it back on to resume normal operation.

Frequently Asked Questions

How do I know when my furnace filter needs to be changed?

You'll typically know it's time to change your furnace filter when you can see it's visibly dirty and clogged with dust and debris. You can also check the manufacturer's recommendations or use a filter change indicator if your HVAC system has one.

Can I clean and reuse my furnace filter?

Most standard furnace filters are not designed to be cleaned and reused. They are inexpensive and meant to be replaced regularly. Attempting to clean and reuse a filter can damage it and reduce its effectiveness.

When should I call an HVAC professional for help with my furnace filter?

If you're unsure about the right filter size or type for your system, or if you encounter any difficulties accessing or changing the filter, it's best to call an HVAC technician for assistance. They can ensure the filter is properly installed and functioning.

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