PRICE DROP!!! These are $2000 new! HEPA Negative Air Machine. Only used a handful of times! The OmniAire 1000V is a popular, compact sized negative air machine, with variable speed control which produces 350 to 900 CFM and weighs only 75 lbs. OmniAire 1000V HEPA air machines are used to clean the air as well as create positive or negative air pressure containment areas on job sites, in confined spaces, moUld, asbestos, and lead abatement or remediation, commercial or factory sites, medical facilities, and many other places. With numerous optional filters, the 1000V is suitable for a large array of jobs from light construction, to tasks that require true 99.99% HEPA efficiency.