HEPA
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HEPA is an efficiency standard of air filters. A HEPA filter is an air filter meeting such a standard.
A portable HEPA filtration unit used to clean air after a fire, or during manufacturing processes
Hospital staff modelling a powered, air-purifying respirator (PAPR) fitted with a HEPA filter, used to protect from airborne or aerosolised pathogens such as tuberculosis
HEPA original filter for Philips FC87xx-series vacuum cleaners
Air purifier
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An air purifier or air cleaner is a device which removes contaminants from the air in a room to improve indoor air quality. These devices are commonly marketed to people with allergies or asthma, and
HEPA
…issues hindering adoption of HEPA filters during the COVID-19 pandemic, a professor at University of California, Davis, created a simple do-it-yourself air purifier design called crbox(Corsi–Rosenthal Box). It involves arranging 4 MERV-13 filters in a cubic shape, the bottom being made out of cardboard, sealing the…
A Sharp FU-888SV Plasmacluster air purifier.
The same air purifier, cover removed.
Air-purifiers with air flow generated by bladeless fan. Some models can act as heaters or humidifiers and may feature oscillation and adjustment of air flow angle (up and down).
An air purifier placed under a table