4.5.2. Description of flats<br>

### 4.5.2. Description of flats

After inserting of storey in building structure and completion of storey data the User can insert flats.

Selecting the command „Add flat” on storey level from handy menu or using shortcut Ctr+F7 or button ”Open menu” the User inserts a flat in building structure. Declaring of flat is also possible in building structure tree by means of icon .

#### 4.5.2.1. Data and results for a flat

In building structure there is a location called as “Default”, to which are to be entered all compartments not included in flats. This concerns such compartments as corridor, staircase, for which ventilation air balance is calculated separately.

Flat description is opened analogous to storey description, e.g. clicking selected flat in building structure tree. In window for data edition of a flat can be entered the name of this flat, comment to name in field „Description” and for calculations of seasonal energy demand it is necessary to complete data concerning internal heat gains from cooking, electric devices, lighting and presence of occupants in the flat by entering their number. Program will assume default number of flat occupants equal to 3. If there are any children in the flat, select window “Flat with children”.

Fields concerning internal heat gains:

Qel/Φel- gains from electric devices per one flat

Default value taken from “General data”, available for modification for each flat separately.

Qlc/Φlc – gains from cooking per one flat

Value of index is copied from “General data”. The User can edit this value depending on real heat gains.

Qintlite/Φintlite– heat gains from lighting per one flat

Value of this index is completed automatically by the program on the basis of entered area of flat. It is possible to enforce this value by the User. For switching between calculation modes use: icon for automatic calculations or icon for calculations enforced by the User.

Np. – average number of occupants in flat

Entering the number of people makes possible calculation of internal heat gain from occupants of this flat, by utilizing of heat gain from a person, defined in „General data”.

Fields for completion of internal heat gains are visible only in case of calculations of seasonal energy demand.

In lower part of flat edition window there are calculation results for flats:

- A – flat surface,

- Ah – heated flat surface,

- V –cubic capacity of flat,

- Vh – heated cubic capacity of flat,

- th/θh – average temperature of heated compartments of a flat,

#### 4.5.2.2. Operations on flats

Operations available in building structure tree – flats level:

Selecting a flat in building structure tree it is possible to call following commands from handy menu (clicking the right mouse button):

- Add flat, F7 – adds new flat on currently selected storey. A flat is inserted on specific storey at the end of list.

- Add flat in selected area, Ins – adds a new flat next to selected one. This command is helpful for the User, which inserts flats in selected order or wants to add a flat in selected place in building structure,

- Delete flat (flats), Ctrl+Del – causes deleting of selected flat (flats) with compartments entered here

- Connect flat – this command connects flats which should create a multi-storey flat. To connect flats located on different storeys it is necessary to select them simultaneously pressing the Ctrl key. For such selected flats this command is active and its selection will cause connecting of selected flats and possibility of selection of main flat from displayed selection window „Select main window”. Command “Connect flat” is used for presentation of three-dimensional building structure – constructional and balanced, mapping their special continuity exceeding one storey.

- Disconnect flats – causes disconnection of multi-storey flat into individual components. This command is actual for the flat, which is connected to it.

- Go to main flat – causes switching to main flat, which is selected by the User from selected flats on various storeys. Entering data concerning internal heat gains in main flat will cause, that these data concerns entire flat. Main menu is specified in building structure tree designated with icon . This command is active for flats being part of multi-storey flat, not main flat.

- Find all connected flats – causes displaying of all connected flats. This command is active for selected area of main flat.

- Add compartment, Ctrl+F7 – adds new compartment in currently selected flat,

- Find element in error list/tree – finding of selected element, for example storey, flat in displayed error list. In this way the User knows, which data have not been completed or have been completed incorrectly.

- Copy (Ctrl+C) – enables copying of selected flat within building structure of actual edited project or to another project.

- Cut (Ctrl+X) – enables cutting of selected flat.

- Paste (Ctrl+V) – enables pasting of copied or cut flat to selected place of building structure of the same or another project.

Description of command „Connect flats”

If the User wants to present complex calculation results of for example heat losses, ventilation air balance for flats on several adjacent storeys, this can be done by means of command “Connect flats”. This command will cause declaring of multi-storey flat. Command “Connect flats” is available after selecting of chosen flats with simultaneous pressing the key Ctrl. Connection of flats can map the building structure (if one flat includes several storeys) or can be a mapping of balance flats connection (for example when the User wants to know which heat losses will be given in total for group of flats). In selected group of flats one flat has been distinguished – this is „main flat”. This flat is representative, that means for this flat are displayed calculations including all compartments and only here the User can edit the flat data. So, here are presented all calculations for group of flats being part of a multi-storey flat.

As a summary, the command „Connect flats” can map three-dimensional structure of a building or can be a mapping of balance system. This expression depends on User’s demands and on his interpretation of building structure.

Within connected flats there is available a command „Connect compartments”. This command is used for inserting of compartments, the height of which exceeds one storey, for example heated, high hall in a family house or staircase in multi-family house. This enables mapping of three-dimensional continuity of building and calculation of common balance of heat and ventilation air for connected flats.

As a summary, it is also possible to connect compartments within connected flats, inserting compartments, the height of which exceeds one storey.

! Command „Connect compartments” is available only for a multi-storey flat.