Air Filter Maintenance Checklist

Window Air Conditioner Filters

How Often:

Every 2–4 weeks during use

Cleaning Steps:

    •    Unplug the unit.

    •    Open the front panel and remove the filter.

    •    Vacuum dust with a soft brush attachment.

    •    Wash with warm, soapy water.

    •    Rinse thoroughly.

    •    Let air dry completely.

    •    Reinstall filter and close panel.

    •    Wipe down exterior grill.

Replace if: Torn, brittle, or warped.

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Central AC / HVAC Filters

How Often: Every 1–3 months

For Disposable Filters:

    •    Remove and replace.

    •    Make sure airflow direction matches arrow on frame.

For Washable Electrostatic Filters:

    •    Turn off system power.

    •    Remove filter.

    •    Vacuum both sides.

    •    Rinse with hose or under sink.

    •    Let air dry flat.

    •    Reinstall once fully dry.

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Air Purifier Filters

Pre-Filters (Washable)

How Often: Every 2–4 weeks

    •    Remove pre-filter.

    •    Vacuum surface dust.

    •    Wash with warm, soapy water (if allowed).

    •    Rinse thoroughly.

    •    Air dry completely.

    •    Reinstall.

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HEPA Filters (Non-Washable)

How Often: Replace every 6–12 months

    •    Check for dark discoloration or low airflow.

    •    Light vacuuming only if manufacturer allows.

    •    Replace if dirty or past lifespan.

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Carbon/Charcoal Filters

How Often: Replace every 3–6 months

If Washable (check your manual):

    •    Rinse with cold water only (no soap).

    •    Shake off excess water.

    •    Air dry completely before reinstalling.

If Non-Washable:

    •    Replace when smells return or filter looks dirty.

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General Reminders

    •    Never reinstall a wet or damp filter.

    •    Do not use bleach or harsh cleaners.

    •    Check your appliance’s manual before cleaning or replacing.

    •    Set reminders to check filters regularly.