Ventilation is used to create an exchange of air masses inside the room with the environment in order to remove fumes, unpleasant odors, pollutants, carbon dioxide and carbon monoxide, etc. from the room. If simple natural ventilation is sufficient for small rooms, then for extensive complexes with many separate rooms, the ventilation system can be very complex and branched, with numerous branches, transitions, tees, etc. For high-quality ventilation work, it is necessary to have a competent calculation, high-quality installation, appropriate thermal insulation and provide protection of the channels from damage – protective covers are used for this.
To ensure protection from external factors of thermal insulation of ventilation ducts and technological equipment, it is recommended to use casings that are made of galvanized sheet, stainless steel or aluminum. Covers for ventilation ducts of rectangular cross-section are made up to 3000 mm long. The thickness of the metal is from 0.45 mm to 1.2 mm. The shell allows you to protect communications from the effects of moisture, ultraviolet radiation, prevents the formation of condensation on the insulated surface, mechanical damage and other environmental factors, gives the systems a complete and aesthetic appearance. Shells are used for various types of insulation sheet materials (mineral wool plates, NPE); tubes or removable casings with a “spike-groove” sealing system (thermal insulation mineral wool cylinders, PPS, PU foam, foamed polyethylene); rolled (all types of mineral wool, unstitched polyethylene); liquid insulation (PU foam, ceramic compositions).