5.2.6. Room<br>

### 5.2.6. Room

There are two types of graphical rooms in the program. One is a room formed as an enclosed space defined by walls – when such a space is created, the new object (room) is automatically identified. Another type of graphical room is a component selected from the toolbar and drawn as a polygon - room outline. In this case the room is subject to calculations in Instal-heat&energy, but all walls, windows and doors must be specified in data tables – they are not associated as drawings with the graphical editor.

! It is advisable to have only one type of rooms in one project.

Room is the key component at the stage of editing a radiant heating system: a heating zone can only be placed inside a room. Both types of rooms have the same data in the table. Room data are important during calculations, due attention must therefore be paid to them.

Button on the “Components” toolbar:

Appearance on screen:

room formed by walls room from toolbar

“Room” component data:

Room symbol

Text field. Symbol of a room is of descriptive nature and is designed to identify it during editing and in the tables of results.

Description

Text field. Description of the room.

ti/qi [ºC]

Numerical field. Temperature inside the room. The default value is specified in general data of the project.

ti/qi below [ºC

Numerical field. Temperature below used when designing floor heating system. When you enter a value here, then respective fields in HZ data of the room will not be modifiable – the value specified here is transferred to HZ data.

If you enter “-“ in the “ti/qi below” field, then no temperature will be assigned and you will be able to specify different temperature for each HZ in the room.

Q/F

Numerical field. As calculations require heat loss value reduced by part of loss to heated floor or wall, this value has no significance for calculations and is included for information purposes only. You may leave this field empty. If heat loss calculations are done in Instal-heat&energy, then the calculated value appears in the data table.

Qreq/Freq.

Complex field. The required output of terminal units in the room. It is equal to Q/F reduced (heat demand in room reduced by loss to heated floor or wall) plus the heat demand distributed from other rooms, for which heat loss distribution to other rooms has been specified. The total output of radiator, radiant heating and of other heat sources, if any, should be equal to this value. This field must be filled in.

An arrow to the right of the field enables opening Qreq//Freq. edit window. Here you can indicate whether the heat loss in the room should be calculated in Instal-heat&energy. You can also specify the data on the type of heating systems in the room and their share in heat loss and specify the distribution of heat in the room.

RH contribution [%]

Numerical field. Percentage of required output of terminal units (Qreq/Freq.) in the entire room covered by radiant heating. The default setting is (auto). In this case, if there is both radiant and radiator heating in the room, as much heat demand as possible is covered by RH, the remainder is accounted for by sizing radiators. You can specify other value.

Qrh/Frh

Numerical field. Required output of radiant heating in the room calculated on the basis of Qreq/Freq. and RH contribution. This is the starting point for sizing. You can specify a value – contribution of RH will then be recalculated.

Rad. contr. [%]

Numerical field. Percentage of required output of terminal units (Qreq/Freq.) in the entire room covered by radiator heating. The default setting is (auto). In this case, if there is both radiant and radiator heating in the room, as much heat demand as possible is covered by RH, the remainder is accounted for by sizing radiators. You can specify other value.

Qrad/Frad

Numerical field. Required output of radiator heating in the room calculated on the basis of Qreq/Freq. and rad. contr. This is the starting point for sizing. You can specify a value – rad. contr. will then be recalculated.

Area w.f.

Numerical field. Surface area of room within wall faces. Value in brackets indicates surface area taken from the drawing. You can overwrite that value. To revert to the value taken from the drawing, enter “?” and press Enter.

Area w.a.

Numerical field. Surface area of room within wall faces. Value in brackets indicates surface area taken from the drawing. You can overwrite that value. To revert to the value taken from the drawing, enter “?” and press Enter.

Show RH data

Selection field. Here you can change the display of RH data table. The default setting is “No”. When you enter “Yes”, additional fields with RH data appear in the table.

Additional data fields for floor heating:

Qrh/Frh distribution ...

Complex field. Manner of distributing heat loss (Qrh/Frh) among HZ’s defined in room. The field can be edited only after placing several HZ’s in the room. Default setting (auto) means that the loss will be distributed automatically among HZ’s available in the room. To distribute manually, expand the window shown below, click on “Manual distribution” and distribute the loss so that the total is 100%. Values in brackets indicate that for these HZ’s losses will be determined automatically. This way the required output may be imposed on some of the HZ’s only, while the program will distribute the remainder of Q/F.

The “Min. remain. Q/F” field in the lower part of the window displays the minimum value of Q that will not be covered by radiant heating. The value is calculated on the basis of areas of HZ’s entered and on tfs/qfs max available for them, which determine the maximum (theoretically highest possible) output of RH in the room. If this value is lower than Qrh/Frh, the “Min. remain. Q/F” field will be filled in.

Room type ...

Selection field. Type of room with regard to manner of its use. Depending on the option selected here, the contents of the fields below, regarding floor surface maximum temperatures, are determined, which has a major effect on the sizing of floor heating. The options available depend on manufacturer’s guidelines and may vary depending on the heating system catalogue being loaded. The “Other” option is also available and it enables specifying room type other than any of those available for selection. For the “Other” option, the fields “Tfs max. ...” below are modifiable, you can therefore determine freely the maximum permissible floor temperature.

Room thermostat (optional)

Selection field. Type of room thermostat in the room. The contents of the selection list depends on the automatic control system selected in the general data.

tfs/qfs max.OZ

Numerical field. Maximum temperature of floor surface in the occupied zone. The value displayed here depends on the room type selected above and on manufacturer’s guidelines. If the “Other” option is selected as the room type, the contents of this field is modifiable, otherwise it is displayed for information only.

tfs/qfs max.sPZ

Numerical field. Maximum temperature of floor surface in the peripheral zone, which forms a separate circuit. Field properties – see the explanation above for “tfs/qfs max.OZ”.

tfs/qfs max.uPZ

Numerical field. Maximum temperature of floor surface in the peripheral zone created at the starting part of circuit. Field properties – see the explanation above for “tfs/qfs max.OZ”.

tfs/qfs max.cPZ

Numerical field. Maximum temperature of floor surface in the peripheral zone created by compacting pipe laying pattern. Field properties – see the explanation above for “tfs/qfs max.OZ”.

Pipe feeds ...

Complex field. Displays total length of pipe feeds running across all HZ’s within the room. You can find a detailed description of the connection lines table in section 6.5.3.

Label type

Selection field. You can select type of room label in drawing from a list. When you select “Configure”, a component appearance window opens, where you can create (by copying) and configure the appearance of components in the drawing. A new label becomes available in the pull-down list in the table.

Description on printout

Selection field. Enables switching off the printing of the field with room label. When “No” is selected, room label will only be displayed during editing and will not be displayed on print preview and will not be printed.