3.2. Building data and their structure <br>

## 3.2. Building data and their structure

### 3.2.1. General information concerning the building data structure

The building as an object being subject in Instal-heat&energy program to thermal calculations consists of following objects:

- partitions definitions, determining their appropriation, heat flow direction and number and nature of layers forming a partition,

- partitions, as elements limiting compartments, with specified dimensions, orientation and „U” coefficient (or heat resistance „R”), by giving the values directly or by assigning to one of partition definition,

- compartments – heated or non-heated spaces, limited by partitions,

- flats, grouping compartments with common ventilation system,

- thermal zones, grouping compartments, for which the heat gains and losses can be balanced for calculations of seasonal energy demand,

- storeys, grouping compartments with the same floor ordinate.

It is not necessary to use the partitions definitions – for calculations of heat losses only it is enough to determine at each cooling partition (in compartment description) its value „U” or heat resistance “R”, nevertheless this method makes difficult performing of calculations for various variants. It is also possible to take advantage of partitions definitions, entering the name and type of partition only as well as its value „U” or value of heat resistance – this method is in praxis the most suitable one for windows.

On the other side, for calculations of seasonal energy demand it is necessary to have data concerning heat capacity for 1 m2 of partition, which can be calculated by the program only according to the knowledge of layers.