Air duct insulation
The insulation of ducts is made to reduce thermal losses (90% reduction) as well as operating costs.
The insulation is made with flexible material ( armaflex-type ) glass wool – low density mineral wool (~ 40kg/m³).
Their coating is made by crafted aluminium sheet 0,6 – 0,8 mm depending of duct cross-section or with galvanized metal sheet 0,6 mm thick.
Waterproofing of external networks rabbets is very important and achieved using sealant cord which applied at rabbet's groove.