4.5. Building structure<br>

## 4.5. Building structure

Description of building structure complying with real plan views enables performing of correct thermal calculation.

Compartment is the basic object of building structure, for which heat loss calculations are performed. Declaration of compartment belonging to flats should be performed by the User gradually, that means, first insert a storey, then insert a flat on the storey and finally insert compartments in flats. It is also possible to change the belonging of compartment to a flat copying or moving it to another flat.

Division of building into flats is required for calculations of ventilation air balance and automatic division of heat losses.

Division of building into thermal zones enables performing of calculations of seasonal energy demand in a building.

To a thermal zone can belong entire flat, several compartments in a flat or group of compartments in a building.

In most cases, disregarding different temperature in bathroom, a flat can be regarded as one thermal zone. In this situation program can calculate simultaneously balance of ventilation air and seasonal energy demand for a flat.

As already mentioned above, because of possibility of description of building in tabular and graphical manner there are available two methods of work with program:

1. Program User can enter the graphical data loading the file from Instal-therm program. After loading to Instal-heat&energy program these data are interpreted tabular and possibility of their modification in area of structure and geometry of the building are locked. Compartments have loaded partition dimensions, type, orientation towards cardinal points of the compass and towards each others as well as assigning of sub-partitions to partitions. Edition of graphical data consists in their completion with tabular data. In this way will be determined the value of value of heat transfer coefficient of partitions, temperature in compartments, vertical geometry of building, e.g. height and ordinate of storeys, data concerning heater recess and others. Completion of graphical data is performed analogous to completion of tabular data – see chapter 2.5.

2. The User can enter data only in tabular manner, e.g. describe the building by definition of partitions, compartments, flats and storeys directly in data tables. Such entered data can be edited in any way. Such method of data input – in tabular manner is described in this chapter.

3. There is also a mixed method. The heated building structure is introduced mostly in graphical manner and non-heated storeys are declared in tabular way. Such method has been described in chapter 2.5.5.

The building structure is described by the User in tabular manner by filling in of fields and tables with data concerning storeys, flats and compartments.

To do this, after defining of partitions go to third position of project „Building structure”. To define the building structure, e.g. declare the building division into storeys, flats and compartments it is necessary to click in succession icon to insert a storey and then icon to insert a flat. To insert a compartment click icon , and to insert partitions into these compartments click icon and icon , if there are any doors and windows in partition. This is very comfortable method of defining of building structure.

Storeys, flats and compartments can be also inserted by means of function keys, for example F7 for inserting of storey, Ins inserts the storey in selected area, Ctr+F7 inserts a flat.

More possibilities of inserting the building structure by means of function keys can be called by right mouse button or by button „Open menu” . Available commands have been described in detail in chapters 4.5.1, 4.5.2 and 4.5.4.

The program will automatically establish in every storey a conventional area, specified as „Default”, designated with icon . Here the User can insert a compartment, which does not belong to any flat, for example corridor, vestibule, garage etc.

During inserting the building structure, program will automatically display it as a tree in lower left window. Clicking the icon you can open the structure tree to any required level.

The building structure tree can be opened very easily with help of icons located in lower part of window. In succession: icon opens the tree to the storey level, icon to the flats level, icon to the compartments level, icon opens the tree to the level of partitions, and the icon to the level of windows and doors. In this way the building can be presented on any required structure level.