sisätiltokerroin

Sisätiltokerroin, also known as the interior thermal transmittance coefficient, is a measure of the rate of heat transfer through a building element, such as a wall, floor, or roof, per unit area of the element. It is a crucial parameter in building physics and energy efficiency, as it helps in determining the thermal performance of a building. The lower the sisätiltokerroin, the better the insulation properties of the building element.

The sisätiltokerroin is typically denoted by the symbol U-value and is measured in watts per square meter per kelvin (W/m²K). It is calculated by considering the thermal resistance of all the layers of the building element, including the materials and any air gaps. The overall U-value of a building element is the reciprocal of the sum of the thermal resistances of its individual layers.

In Finland, the sisätiltokerroin is regulated by the Building Code, which sets minimum requirements for the thermal performance of new buildings. The code aims to ensure that buildings are energy-efficient and have a low environmental impact. The sisätiltokerroin is used as a key parameter in the calculation of the energy performance certificate for buildings, which is required for all new buildings and renovations.

In summary, the sisätiltokerroin is an essential parameter in building physics and energy efficiency. It is used to determine the thermal performance of building elements and is regulated by the Building Code in Finland. The lower the sisätiltokerroin, the better the insulation properties of the building element.