Abstract: A method and arrangement for air conditioning completely or partly a locality in a building, where the construction of the building comprises elements of e.g. concrete having parallel channels through which air is passed. The used air is ventilated from the locality after this air has been heated by machines, electric lights, e.g. and people within the locality and heat exchangers having greater masses and in which the accumulating effect can be used. Comprise parts of the building which operate as regenerative heat exchangers. Used air is passed from the locality with a given temperature through channels (2) in elements (3) of the construction, whereby heat is transmitted to the elements, whereafter the air is passed out to the ambient environment. Fresh air is passed in the opposite direction from the ambient environment into the locality through the channels and these two phases are repeated regularly and regulated during 24-hour periods.

Abstract: Air condition control for buildings, having a roof structure of roof trusses relatively widely spaced, between which self-supporting roof plates are laid and covered by a covering layer so that a gap is formed between the covering layer and the roof plates. Air is passed in one or the other direction through a ventilation opening in the roof, through the air gap (13) and through ducts (9) in the roof plates. Air sucked in from the atmosphere through the ventilation opening passes through the ducts to an air conditioning unit (5) and to a distribution device (6) to maintain a suitable temperature in the building. Air flow can also be inverted by being supplied in the form of outdoor air to the air conditioning unit (5) and after its passage through the building being conducted away into the atmosphere through the roof structure by the ventilation opening.