Optimized air duct, suitable for the air flow from air/water heat pumps installed inside. Plug-in system consisting of 4 glass fiber concrete side panels with a heat and sound insulated interior to prevent condensation and to significantly reduce sound transmission (sound insulation value ~1 dB(A) per linear meter, bend ~3 dB(A)). 2 end frames provide additional stability for the air duct and enable the side panels to be easily assembled. The ducts must be protected from driving rain and can be suspended on site or painted with waterproof emulsion paint if required. Delivery includes Multikraft adhesive.
