Central to the OA1000 Plus versatility is its 12 in deep True HEPA filter, boasting an exceptional efficiency rate of 99.97% at 0.3 microns. This robust filtration capability ensures the removal of a wide spectrum of airborne contaminants, making it an invaluable asset where clean air is of the utmost importance. The easy-to-maintain machine includes a HEPA filter replacement indicator and the pre-filter can be replaced without tools, for user convenience. Maintaining a compact and low-profile design, the OA1000 Plus provides two-speed control and allows users to toggle the airflow to meet specific requirements. This versatility provides better control over air circulation and filtration, making it adaptable to various environmental conditions. The OA1000 Plus also includes a runtime meter, facilitating efficient monitoring of HEPA filter replacement and overall project duration. With the Plus model, there is an optional audible alarm, further ensuring optimal filtration performance and compliance in jurisdictions requiring this feature. This model holds UL/CSA Safety Certification and features a thermal protection overload monitor, guaranteeing 24/7/365 safe operation.