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Linear thermal bridges

The table Linear thermal bridges under the properties, shows the thermal bridges that are present in the project. This table is normally empty.

The table needs to be filled in when:

  • There is an EPG calculation and under Project data > Project settings > Ψ-values for transmission > Detailed;
  • When a Building simulation is calculated.

Zone

  • EPG

The column ’zone’  is the line where you can fill in the thermal bridges. The ’zones’ are made under ’ properties’ and ’zones’. A zone can be a calculated zone as well as a neigbouring unheated area or conservatory.

Room

  • Gebouwsimulatie

This column ‘room’ is the designated place to fill in the properties of the linear thermal bridges.

Length

In the column length, the length of the linear thermal bridges can be filled in in metres. A thermal bridge can boarder on the: outdoors (par 6.1 NEN 1068:2012), the soil package (par 7.3 NEN 1068:2012) or boarder on an unheated area or conservatory (chapter 8 NEN 1068:2012).

Description

In this column ‘ description’ you can give a description of the linear thermal bridges. This will also be absolved into the reports.

Connection type

In the connection column, you have the following options:

  • Outside air: specification of a linear thermal bridge adjacent to the outside air.
  • Basement/floor: specification of a linear thermal bridge for the ground floor (perimeter) adjacent to the ground (directly on the ground, with or without an air layer, and floors above an unheated basement).
  • Crawl space: specification of a linear thermal bridge for the ground floor (perimeter) adjacent to the crawl space; an additional input field appears for specifying the ventilation openings of the crawl space.
  • Unheated room: specification of a linear thermal bridge adjacent to an unheated space or conservatory.
If linear thermal bridges are specified in the calculation zone adjacent to ground, unheated basement, or crawl space, but there are no floors specified in the calculation zone adjacent to ground, unheated basement, or crawl space, these linear thermal bridges will be disregarded.
If multiple unheated spaces or conservatories border the zone for which the linear thermal bridge is specified, the zone should be divided into multiple zones. The calculation will default to using the first unheated zone it encounters.

Ψ-values

In the column Ψ-values is the linear thermal heat transmittance (psi) value of the linear thermal bridge. Appendex G NEN 1068:2012 gives the flat rate values.

ε

In the column ε gives the sqmeter of the ventilation openings per meter girth length of the crawl space in m squared per meter. 0,0012 m2/m.

It is only possible to specify the surface area of the ventilation openings if Crawl space has been selected for Connection.

Filters

In every column of the table linear thermal bridges, you can apply filters. When a filter is activated, it will light up. With the filters you can change the visibility of the data.

Orientation

  • Gebouwsimulatie

Choices include North, Northeast, East, Southeast, South, Southwest, West, Northwest.

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