assessments carried out on apartments is given below.
The deliverable covering this area is D23 and the full version can be accessed through the Class1 web site
Ultra low-energy apartments
The monitoring was made with building energy management systems (BEMS) manufactured mainly by the
companies, ElectronicHousekeeper and Seluxit. The systems monitor the total electricity demand, thermal
energy demand for heating and the total consumption of water. The data from the monitoring were
available on an online server, from which the data were downloaded and analysed. Not all data from the
mentioned period were available in all the houses due to several factors: some houses were still under
construction, the systems were installed later or the systems did not function adequately.
Monthly data have been considered for the analysis to obtain the annual average consumption of the
monitored quantities: Heating Energy, Electric Energy, Domestic Hot Water Energy. Data are considered for
the analysis only when at least 12 consecutive monthly data are available. In addition, the magnitude
coherence of the time series data has been taken into account, and inconsistent data have been neglected
(see Figure 47).
The value of the monitored total electricity demand is subtracted of an estimated value due to ventilation
for heating purposes. The estimated ventilation air flow rate is the highest value between an air change
rate of 0.5 vol/h, and the air flow rate to obtain prescribed values for kitchen, bathroom and wc.