5.2.8. Horizontal partition: ceiling<br>

### 5.2.8. Horizontal partition: ceiling

The “Horizontal partition: ceiling” component cannot stand alone – it may only be placed in a room and is assigned to it. However, separate data referring to this partition are displayed in the table. A ceiling type component is taken into account when heat loss calculations are done – just like in the case of a wall, window and door, the ceiling has a partition structure and U0 coefficient assigned.

To place a ceiling in a room, select it from the “Components” toolbar and click anywhere within the room area. The ceiling is inserted in the room within its axes to correspond to the size of the room below. It may be necessary to insert several ceiling type partitions into one room, depending on the number of rooms above the given room.

It is better to insert and describe internal ceilings as “Floors”.

Button on the “Components” toolbar:

Appearance on screen:

“Horizontal partition: ceiling“ component data:

Calculated in Instal-heat&energy

Selection field. Determines whether partition is to be accounted for in Instal-heat&energy during heat loss calculations.

Partition structure type

Selection field. Type of partition structure. When heat loss calculations for rooms and specification of partitions is done in Instal-heat&energy, then this is a selection field where you can select a pre-defined partition from a list. If a type has already been assigned to the floor in Instal-heat&energy, then its name is automatically displayed in the graphical editor and the appropriate U0 coefficient is displayed in the field below.

U0

Numerical field. Coefficient of heat transfer across partition. When specification of partitions is done in Instal-heat&energy, then this field cannot be modified. The coefficient is automatically filled in for the partition type selected from list.
The name of partition structure and U0 coefficient can be entered directly from the keyboard in the graphical editor – then after loading the project into Instal-heat&energy, the partition type and U0 assigned to the given wall in the room are displayed in the building structure.

Area within axes [m2]

Numerical field. Surface area within axes. Value determined from drawing.

Area within faces [m2]

Numerical field. Surface area within faces. Value determined from drawing.

Outer area [m2]

Numerical field. Outer surface area of partition.

! Internal ceilings should be placed and labelled in the project only once. You can insert an internal ceiling either as a “Ceiling” on the lower storey or as a “Floor” in the upper storey (the latter method is preferable).