Fasel insulating tunnel-type box made with a high-density expanded Neopor body and internal frame, with grating of 7 bars of 4 mm welded galvanised steel to improve solidity and ensure maximum rigidity when being handled on site. The boxes have aluminium guides to retain plaster and hold the inspection cover. Their materials and structure provide them with high thermal and noise insulation indices.
Ideal for installation with Supergradhermetic adjustable shutters. Ready for motorised activation.