The Portable Clean Room is a compact positive pressure system designed to provide exceptionally clean laminar airflow inside the hood. This system utilizes a dual stage filtration process which consists of a MERV8 pre-filter and a HEPA filter with an efficiency rating up to 99.97% efficient on particles .3 micrometers and larger. For applications requiring a higher efficiency an ULPA filter is available with an efficiency rating of up to 99.9995% at .12 micrometers.