Protan Ventiflex has been manufactured for 60 years. Focus on continuos technical development and growth in markets has given Protan the position as one of the world`s largest manufacturers of ventilation ducts.
Ventiflex are sold all over the world. The materials used for Ventiflex are made to meet the requirements posed for the operation of modern tunnels and mines. Textile and coating make up a unique fabric and the suspension system makes the duct even stronger. The duct is made from a soft, flexible material that is flame-retardant, resistant to chemicals and maintenance free.
Engineering
A theoretical description of the calculation of ventilation you can find here (PDF)