The sizes highlighted in green approximate the typical 4 to 40µm range of a filter test conducted per ISO 4548-12. A system can be calibrated to report additional efficiencies for the large particles, ...

ZenGUARD™ Enhanced Air Filters achieved an average infectious aerosol removal efficiency (εPR) of MS2 bacteriophage of 42% compared to an untreated filter, which achieved an average εPR of 16%. These ...

We found that most water filter pitchers will purge your tap water of bad tastes and odors, but the worst ones we tested were slow and prone to clogging Looking for a water filter pitcher? Consider ...