Air Quality research
HEPA filter grades
HEPA filter grades explained with source boundaries, specification context, and BenchPicked methodology notes.
Written by BenchPicked Editorial Team · Sources checked May 13, 2026
What this page covers
This page organizes published product information, source notes, and buying context without presenting first-hand test results or medical conclusions.
Research summary
Overview
HEPA filter grades describe particle-capture performance standards; product pages may use terms such as True HEPA, HEPA-type, H13, or H14, which should be checked against the cited source.
Review boundary
BenchPicked separates general background information from product performance claims.
Source notes
- EPA Guide To Air Cleaners In The Home · Government · Checked May 13, 2026
- AHAM Verifide Room Air Cleaner Directory · Industry Standard · Checked May 13, 2026
Questions
What does True HEPA mean?
True HEPA usually refers to a filter class intended to capture fine particles, but the exact grade should be checked against the manufacturer or standards citation.
Is HEPA-type the same as HEPA?
No. HEPA-type is a marketing phrase unless the source provides a specific tested filter grade or standard.
Do filter grades replace CADR?
No. Filter grade describes the filter medium, while CADR reflects cleaned-air delivery for the whole room air cleaner.
How to use this page
Use this page as a source-attributed starting point. Check the published specs, read the methodology, and compare related pages before making a purchase decision.