Insulations used in ventilation systems can be formed of stone wool, glass wool or rubber mat.
The most frequently employed ones are the slats made of stone insulation or glass insulation with aluminium foil which are used as the diffusing system thermal insulation.
The silencers also have wool as acoustic insulation which, depending on the shape of the silencer, is used as panels with a veil or as a wrapping for the round silencers.
The rubber mat is not only used as thermal insulation but also as an acoustic insert in plenum boxes for ventilation diffusers.