noun
charcoal filter
A filter that uses activated charcoal to remove impurities, commonly found in water purifiers, air purifiers, and range hoods.
この浄水器にはチャコールフィルターが内蔵されています。
This water purifier has a built-in charcoal filter.
Variant with interpunct; less common but still seen.
Loanword from English 'charcoal filter'.