As we already know, the energy demand of a property depends the characteristics of its thermal envelope, as well as the other factors related to discipline bioclimatic with respect to the location and orientation of the facades of the building according to the characteristics climatic conditions of the place where it is located.
When we try to obtain the energy rating of a existing property we are very conditioned by said parameters, given that they condition the energy demand and greatly influence the consumption and the final grade.
It seems logical therefore, as established in the Appendix D of DB HE 1 of the Technical Code, on zones climatic conditions, which we must consider when we find ourselves before a property located in areas of mountain within a certain province with important altitude differences with respect to the capital of province we should consider another climatic zone since, obviously, weather conditions vary.
Next we will analyze to what extent you can influence the climatic zone in the final qualification of the energy certificate using the CE3X, through a example of a house in two cases, in the first Of course it is considered the climatic zone of Valencia capital "by default" without taking into account the previous table, and in another case in which it is considered, since as we will see, due to its altitude corresponds to a climatic zone much higher unfavorable. We start by assessing that, evidently, the area climate to consider will be different and that the scale of rating will be too.
Content menu:
It is an individual dwelling in a block, whose year of construction is 1998, with a useful living area of 99 m2, in this case in the general data tab of the CE3X we introduce the locality, indicating that it is Utiel, but we leave "by default" the climatic zone that corresponds to Valencia, that is, zone B3.
We observe that the program gives us the qualification next:
In this second case, as it is a house located in the town of Utiel, we went to Wikipedia to obtain its altitude, according to which it is 720m above sea level.
Taking into account that the reference altitude for Valencia is 8m, according to the previous table, we obtain that the difference in level between the town and the capital of the province in meters is 712 m, so that according to table D.1 of zones climate we consider zone D1. When operating the program We not only indicate the location, but we will select said climatic zone (HE-1).
In this second case the program gives us the rating next:
CONCLUSIONS:
In this second case, we can appreciate some very higher in heating compared to the first (74.5 Kwh/m2 rises to 183 Kwh/m2) and also in refrigeration the demand appears as non-qualifiable, which indicates that it does not have demand. Here it is demonstrated as I commented at the beginning of the article the influence of altitude and climate on demand energy of the property and ultimately in its rating.
In this second case, it can be seen that the scale of qualification is different, so that in this second case the indicators used by the program are different and the intervals in each letter with respect to the indicator kg CO2/m2 are older.
In this second case, it can be seen that with the demands and consumption obtained in the new qualification scale, the housing has worsened a letter from an initial F to a G final. I understand that this circumstance does not always have why happen, but given the conclusions obtained, it is It is important to always consider the appropriate climatic zone according to the second case, considering the altitude of the locality of according to table D.1 of climatic zones.
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Article prepared by José Luis Morote Salmeron (Technical Architect – Energy Manager – Profile from Google plus) Access to your website HERE, in collaboration with Home Repair Care.
