How often should I clean the air filter on the LB-H0850QC?
The air filters should be checked and cleaned once every 2 weeks, or more often if necessary. Clogged air filters reduce airflow, lower cooling and dehumidifying effects, and can waste up to 6% of the electricity used to operate the air conditioner.
From the official LG LB-H0850QC Air Conditioner manual, page 12
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