Rocvent Inc. is a global manufacturer and supplier of a full line of positive and negative pressure ventilation ducts, fans and accessories. With more than 30 years’ experience, Rocvent also offers a complete range of products for 50 and 60 Hz system-design capabilities based on supplied parameters. Its ducting is especially designed for rough, hostile underground mining and tunneling environments, and for the use of advanced radio-frequency (RF) welding techniques to ensure consistent strong welds on tubes in diameters from one to 10 feet (0.3 to 3.1 metres). Custom lengths and special in-house-designed suspension and Snap-Roc couplings, zipper joints and Velcro connections are also available, as are inflatable head covers that have protected miners from falling loose ore in passes and raises for nearly 20 years. The Rocvent team has earned its reputation as “manufacturer of the highest quality products at competitive prices.”