When was this clue last seen?

This clue last appeared in the NYT Crossword on Saturday, 02 August 2025.

Big acronym in purifying filters

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purifyingacronymfilters

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This clue appeared in the NYT Crossword on Saturday, 02 August 2025. The answer HEPA is a 4-letter entry.

This answer appears frequently in crosswords. View HEPA answer history →

What is the answer to "Big acronym in purifying filters"?: HEPA
How many letters is the answer to "Big acronym in purifying filters"?: The answer has 4 letters.
When was this clue last seen?: This clue last appeared in the NYT Crossword crossword on Saturday, 02 August 2025.
Has this crossword clue appeared before?: Yes. Variations of this clue have appeared 5 other times.

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