Selection

Compare HEPA H13/H14 vs ULPA in cleanroom FFUs—EN 1822, MPPS efficiency, pressure drop, ISO class pairing, and how to avoid low-airflow failures after a filter upgrade.

Step-by-step FFU selection for ISO cleanrooms—coverage ratios, ACH, module size, EC vs AC, HEPA/ULPA, and an inquiry checklist that gets accurate quotes.

Calculate how many FFUs you need using ACH or ISO coverage ratios—worked examples for 1175×1175 and 615×615 modules, plus margin for filter loading.