Housekeeping · 실내 난방 관리

Check and replace a central heating filter in six steps

Clogged central HVAC filters restrict airflow. Follow a monthly inspection routine based on DOE advice.

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U.S. Department of Energy

U.S. DOE recommendations on central heating filters

Link to DOE monthly furnace filter guidance

This is for ducted central HVAC, not a washable split AC filter; follow your equipment manual.

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Confirm a ducted system and locate filter dimensions and direction in its manual.
Set a monthly reminder to inspect the filter during heating use.
Switch off and open only the user-accessible filter panel; avoid wiring.
For clogged or due filters, obtain the correct size and rating; do not wash disposable units.
Align the airflow arrow as directed and close the panel securely.
Record the date and seek service for persistent airflow problems; follow model-specific intervals.