Finish

The finishing can be defined for both the inside (interior) and the outside (exterior) of a construction for floors, roofs, walls, panels and doors. It is important to know that walls, panels, windows and doors are defined using an inside and an outside. Floors and roofs are defined based on an upper and lower side, irrespective of whether the inside or outside is concerned.

Type

CL
The type of construction needs to be specified in order to determine the surface heating allowance. It is only possible to specify the type when choosing ‘Rc and density’ in the description input. If the ‘material layers’ input is chosen, then these values will be calculated by the software automatically.

•      Stony; a stone-like wall is a wall without coating and without an insulating layer with a lambda-value <= 0:07 W / (m.K) at the side. This wall is included for 100% heating in the heat loss calculations.

•      Stony with isolation covering;  a stony wall with insulation covering is a wall with an insulating layer with a lambda value <= 0:07 W / (mK) on the inside and / or on the outside. This wall is included for 70% heating in the heat loss calculations.

•      Not stony: a wall which is not stony is not included for the surface heating allowance.

Absorption

Standard 0,6 CL
The absorptivity is the heat or cold which can be absorbed by the surface of a construction relative to the specific heat of the material. This characteristic depends on the surface finishing such as colour and coating, and the type of material. The absorptivity holds for short wave solar radiation, whereas emissivity considers the long wave solar radiation. Consequently, the absorptivity and emissivity do not have to be equal to each other.

Emission

[factor] Standaard 0,9. BS
The emissivity is the heat or cold which can be emitted by the surface of a construction relative to the specific heat of the material. This characteristic depends on the type of material; metal surfaces generally have a lower emission coefficient. The emissivity considers long wave solar radiation, whereas absorptivity holds for short wave solar radiation. Consequently, the absorptivity and emissivity do not have to be equal to each other.