Respond to these showcases www. ajplus. co. uk/ajdirect Readers may obtain information about these products by filling in the enquiry numbers on an AJ enquiry card. Advertisers wishing to promote their products on these pages should contact Chris Bond on The introduction of two new AutoCAD workstations combined with an increase in technical staff numbers has allowed Vortice to offer its most comprehensive design service yet. Vortice offers free technical and design assistance and advice for all aspects of mechanical ventilation.