Drying or keeping dry, e.g. by air vents (; during erection E04G21/28)

Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs > Insulation or other protection; Elements or use of specified material therefor > Drying or keeping dry, e.g. by air vents

Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs (scaffolds, shutterings E04G; structures specially adapted for buildings for special purposes, general layout of buildings, e.g. modular co-ordination, E04H) > Insulation or other protection; Elements or use of specified material therefor (chemical compositions C01 - C11; implements for applying insulation or sealings E04F21/00; buildings to withstand, or to provide protection against, external undesired influences E04H9/00; sealing pipes in walls or partitions F16L5/02; shielding against dangerous radiation G21F) > Drying or keeping dry, e.g. by air vents (; during erection E04G21/28)