Deelat's HVAC ducts vary in length from 0.7 meters (2 feet) to 10 meters (32 feet), and in diameter from 150 millimeters (6 inches) to 600 millimeters (24 inches). The HVAC ducts are made from approved PVC materials and incorporate a steel wire helix for reinforcement of shape and strength. One end of the duct can be attached via a strap to a ventilator, and the ducts can be attached to one another using the same strapping method. Flexible duct products are ideal for applications requiring quality ventilation and excellent flexibility, including removing toxic fumes and supplying oxygen.