Indoor climate: is there a patent solution? Inomhusklimat: finns det nagon patentlosning?

There is no patent solution. Discusses duties of ventilation system: to create a satisfactory indoor climate in a cost-effective manner while considering the demands of three intimately associated factors - well-being, health, working efficiency, risk. Notes the various criteria to be complied with to provide satisfactory ventilation: thermal requirements, air quality requirements, noise/safety, flexibility and economy. Considers the threetypes of air flow: displacement, mixing and'short-circuit' ventilation, and states that all ventilation comprises these three types to varying degrees.States that the important considerations are having the right system in the right place and gives a simplified model for the choice of system and type of air flow.