Ventilation ducts and any inspection doors used in them should be made of non-flammable materials, and combustible thermal and acoustic insulation as well as other combustible cladding of ventilation ducts may be used only on their outer surface, in a way that prevents the spread of fire. The distance of non-insulated ventilation ducts from carpets and flammable surfaces should be at least 0.5 m. A novelty in relation to the regulations in force so far, in which there were no restrictions on the length or method of routing the flexible hoses, it is a record, that when using flexible ducts in the installation, they should be made of materials that are at least difficult to ignite and should not run through the elements of the fire separation, and their length should not exceed 250 mm in the case of connection of fans with ventilation ducts and 4 m in the case of connection of the remaining elements of the installation and devices with rigid ventilation ducts. In plumbing installations, plumbing and heating, all applied thermal and acoustic insulation should be made in a way that prevents the spread of fire.

Another novelty in relation to the previously binding regulations are the detailed requirements for ventilation and air-conditioning installations. According to them, the pipes of mechanical ventilation and air conditioning systems should be routed and made in such a way, that in the event of a fire they do not exert a force greater than 1 kN for building elements, and that they pass through the partitions in a way that allows for their elongation to be compensated. Fixing the pipes to building elements should be made of non-flammable materials, ensuring the absorption of the force generated in the event of a fire in a time not shorter than required for the fire resistance class of the cable or the cut-off damper. No other installations should be installed in the ventilation ducts, and the filters and silencers used in them should be protected against transferring to their interior burning particles. Ventilation and air-conditioning engine rooms should be separated by walls with a fire resistance class of at least El 60 and closed with doors with a fire resistance class of at least El 30, this does not apply to devices installed above the roof of the building. Electric heaters fired with liquid or gaseous fuel may be installed in the ventilation duct, whose heating surface temperature does not exceed 160 ° C, on condition that a temperature limiter is used, automatically switching off the heater operation without air flow. It is also allowed to install fans and air treatment devices in the ventilation duct, provided that their housings are made of fire resistance class El 60.

Ventilation and air conditioning ducts at the point of passage through the fire separation elements should be equipped with cut-off fire dampers of fire resistance class (He), equal fire resistance class of the fire separation element. Until now, it was sufficient to use cut-off fire dampers with a fire resistance equal to half the fire resistance of a partition, in which they were located. In addition, another change in the new regulations, there is a record, that in the case of passage of pipes through walls and ceilings that are not elements of fire separation, for which a fire resistance class of at least El is required 60 or REI 60, the fire resistance class of the culverts should be equal to the fire resistance class (He) partitions, where they are located, which is tantamount to the obligation to equip them with appropriate fire shut-off dampers.

In the case when the cables are led through the fire compartment which they do not serve, alternatively to be equipped with fire shut-off dampers, it is possible to enclose them with elements of fire resistance class (He) required for the fire separation elements of this zone. In fire zones, where a signaling and alarm installation is required, fire dampers shall be actuated by this installation, regardless of the thermal fuse used. The above requirements have been tightened compared to the previous ones, when it was enough, to make the resistance of the encased wire, cut-off damper or encased conduit with the damper, was half the fire resistance of a fire separation.