HEMCO Corp (Independence, MO) offers exhaust blowers, ducting and components, HEPA and carbon filtration, fume scrubbers, and manifold systems, as well as fume hood blowers designed to exhaust corrosive fumes, humid or polluted air, gases and odors. These blowers are in coated steel or PVC, in standard or explosion proof models.
HEPA Filter Paks effectively collect particulate contaminants from the exhaust air stream. HEPA filters are 99.99% efficient at removing particulate .3 micron and larger.
www.HEMCOcorp.com/hoodvent.html, 800-779-4362