COMMENTS
After the window weatherisation the indoor temperature is nearly constant at outdoor temperature varying in 10 oC interval as shown in fig.1
These results for the indoor air temperature are achieved by intermittent operation of the boilers, as shown in fig.2,3 and 4.
The observed DHW consumption during the night on 6-7 Feb. shown in fig.6, which is typical for the DHW system, leads to the conclusion that there are significant losses due to leaks. For this reason the team gave the recommendation the DHW system to be cut off in the night hours. The results are shown in fig.5
The heat balance based on the five days measurements shows average daily fuel consumption and overall boiler efficiency very close to the estimated values of the same parameters for the long term data given in Table 1_SH (please see the Appendix). That is a reason to consider the data from the hourly measurements as representative.