The software was based on an existing general platform taking into account the specific hotel characteristics. The XENIOS methodology and software was based on two similar methods developed for apartment buildings (EPIQR) and for office buildings (TOBUS) in the frame of two previous EC research projects.

XENIOS tailor the available tools and combine other multimedia features (i.e. visual material and other aids from hotel buildings) and hypertext, in a well-organised manner, easy-to-use environment. The key objective was to organise the information that addresses different topics in a global manner so that the user can approach it in a well-organised fashion.


The software was adapted, with feedback from the hotel field studies (i.e. audits and pilot study) and expert evaluations, that was carried out during the project. The software incorporate the entire methodology and tools in English. Given the transnational representation by the partners from the various participating countries, the software will incorporate any readily available national information and data. However, it was not intended to prepare national versions of this tool in the framework of this project. The software infrastructure will be ready to easily adapt the tool to future national language versions. Accordingly, the data bases used in the software was based on information from one country. However, as mentioned before, the infrastructure will allow for easy future adaptations. (Software Version 1.3)


The available methodologies for simplified energy load calculation modules available in EPIQR and TOBUS were also been integrated in the tool. Additional calculation modules contributed from participants weren also been integrated


The indoor environmental quality (IEQ) is another important parameter that must be satisfied by energy efficient measures. Energy efficiency does not mean that one has to sacrifice comfort. Actually, it is possible to improve IEQ and at the same time the steps taken to make more efficient use of energy can have a significant payback. Improved services and comfort conditions mean better client satisfaction and better business for the hotel. To that extend, any business that maximises efficiency and reduces waste can reduce operational costs. The saved money can then be invested in other areas like to improve facilities, open up new employment opportunities etc.

A systematic audit and assessment of the indoor environment should also account for the indoor air quality. A known problem is legionellosis that has attracted a lot of attention and is common concern in hotels, especially the ones that operate on a seasonal basis. During off-season periods that hotels remain closed, high humidity and still water encourage legionellosis that may become a serious problem if not proper precautions are taken during the re-opening of the hotel.

XENIOS address this kind of topics related to IEQ and provide sufficient background information in order to increase awareness and minimise potential risks.


Another important concern is with regard to water consumption which can vary from 80 litres per room per day, to over 170 litres per room per day if no other measure is taken to encourage water saving. Water consumption for landscaping, hot water and swimming pool services, mechanical installations, can increase its value especially in tourist areas (i.e. islands) where it is a valuable commodity. In particular, water use for landscaping (necessary for aesthetics) can be reduced by properly selecting the right trees and vegetation. The role of landscaping is even more important when considering its role to improve microclimate, reduce the building’s cooling and heating loads.


XENIOS address this kind of topics related to water savings and the environment, and provide sufficient background information in order to increase awareness and potential benefits.


The financial assessment of energy conservation measures and the use of renewable energy technologies can become more attractive if evaluated within the general frame of a building refurbishment campaign. For the cost analysis, XENIOS utilise the detailed cost databases already available in the existing methodologies (EPIQR or TOBUS). Any additional data were based on values from one country. However, the general structure of the data bases allow for future adaptations to national cost data. Accordingly, the project partners may provide national data, if possible, and NOA could incorporate it in their national version of the software.


European and national codes and regulations with regard to the RUE and RES building integration were included and coupled with the various building elements and tools, in order to assist the user in the decision making process. The project partners may provide national data, if possible, and NOA could incorporate it in their national version of the software.

The software was prepared in English. Any national versions will be the responsibility of the national project partners