Belt and direct drive exhaust blowers from HEMCO Corporation are chemical resistant and available in standard and explosion-proof models. They efficiently remove hazardous fumes from within the fume hood. Epoxy-coated steel belt or direct drive units from 250 to 2,000 cfm have adjustable discharge and weather covers. PVC belt or direct drive blowers range from 230 to 1,600 cfm. Ventilation accessories including ducting, filters and components are available. 800/779-4362; www.hemcocorp.com.