For the third year running, Burton on Trent ventilation systems supplier Vortice has ended the year with a double digit increase in sales. Vortice specialises in energy efficient ventilation systems for domestic, commercial and industrial projects.<br> <br> General manager Kevin Hippey says: "Our focus in these testing economic times has been on energy efficient ventilation systems and innovating so that we're consistently producing products that are up to date and appropriate for tomorrow's housing, commercial and industrial developments."<br> <br> Vortice has developed a range of heat recovery systems for domestic and commercial application that have been particularly well received, the company claims. The systems have featured in some of the country's top property schemes. In addition, its air handling unit division is working on some key developments where its hygiene rating makes the product especially suitable for food, pharmaceutical and health industry applications.<br> <br> www.vortice.ltd.uk