When an air duct goes through a wall that works as a fire wall between two different fire areas, the penetration should be fire proof according to the local building codes and norms. Passive fire protection by fire insulating is the cheapest way to do this in houses.

Fire proof solutions for air duct penetrations can be carried out easily with PAROC fire insulation slabs and wired mats. Requirements and solutions vary from country to country. Please ask more information from your local Paroc representative.