## 2 Case Description  
A previous paper described the WSN technology and proposed its application in the building sector as an alternative to RFID technology [7]. It was found that the implementation of such sensor technology would increase the quality of buildings, improve process efficiency, and lead to numerous improvements in all aspects of a building's life cycle, from its design and construction to its operation, renovation and eventual demolition. This is due to the availability of information on the state of all the components involved. In this way, the new technology can decisively improve the whole value chain of a building. The research made an effort to understand the technology and prove the concept in building sector applications. Based on these earlier investigations, this paper does not demonstrate new technological solutions, but rather discusses the advantages that the introduction can have for the given sector, and therefore how the introduction of the IoT can also lead to great advantages for society as a whole.  
The application of WSN technology in buildings in Denmark was investigated by [PERSON] [17] and [18]. There is need for skills, solutions and technologies that match the given case, but [PERSON] showed that there are no barriers to the implementation of the technology as such. Wired power supply proved superior with respect to robustness, so the final installations in the tests referenced by [PERSON] were based on wired power supply, but with WSN communication. The applications were laboratory trials preparing the full-scale installation in Denmark and Greenland.  
A full-scale installation was planned for a dormitory in cooperation with ARTEK, the Centre for Arctic Technology in Sisimiut, Greenland. WSN seemed relevant due to its high flexibility. The case is presented here with observations with respect to the introduction of the Sensing Internet in rural areas.  
The building and its ventilation scheme are shown in Figure 2.  
Figure 2: Layout of building, which was to be split into two similar-sized sections for experimental purposes.  
Previous studies undertaken in this building have shown that the poor design of the ventilation system constantly causes the building to over-ventilate [19], which in such a cold climate means a significant increase in energy use. So renovation seems essential with energy savings as a motivating driver. The basic idea of the installation was to add CO\({}_{2}\) control to an existing ventilation system. The setup would be applied to various control schemes, from an all-building control down to individual room control.  
The whole system was designed remotely in Denmark on the basis of reported information, drawings and design manuals. Due to a conference in Sisimiut, where the building is located, the author had a chance to see the installation on site. It turned out that the ventilation system had stopped functioning because the heat exchanger had burst due to icing approximately one year earlier. This very important information was not communicated in time, which would have stopped the project and the resources would have been reallocated. On the other hand, we would not have had insights for the current paper.