Modular Clean Labs from HEMCO Corporation have chemical-resistant modular construction for ease of on-site assembly. They achieve strict environmental control by incorporating HEPA and/or carbon filtration to regulate air quality. Humidity can be regulated with desiccant systems available for lower humidity requirements. Options include a wide selection of doors, lighting, plumbing, electrical and lab furniture systems that can be factory installed. 800/779-4362; www.hemcocorp.com.