3-Stage Filtration System: AlorAir Cleanshield HEPA 550 Air Scrubber build with Airflow 270-550 CFM with Variable Speed as a portable HEPA air purifier. It can be with up to 3 levels of filtration, pre-filters, activated carbon/HEPA filters. This Air machine has a Filter change light, an hour meter display, a daisy chain GFCI Duplex, Stackable, and variable speed control and regulator. These has allow you to keep track of the conditions of your work environment. Inlet 16'. Outlet 8'. 10-YEAR Guarantee: 1-year parts and labor, and 10-year housing guarantee . This HEPA air cleaner with cETL listed has a Circuit breaker protector that protects not only connected loads but onboard components.EO# G-19-116 EPA# 99216-CHN-1. Cleanshield HEPA 550 in small size, makes it easy to move from one room to the next, and the system is stackable and made from rotomolded plastic for maximum durability. AlorAir Cleanshield HEPA 550 Air Scrubber suited to home repair and construction sites, sewage remediation, water, and fire damage restoration, This separately sold filter is for a salon or print shop.