läpivetävyys

Läpivetävyys is a Finnish term that describes the phenomenon of air or wind passing through an enclosed space. It refers to the ability of air to circulate or move through a building, room, or other enclosed area. This can occur through intentional openings like windows and doors, or unintentionally through leaks and cracks in the building's structure. The concept is important in building science and ventilation, as it directly impacts indoor air quality, energy efficiency, and thermal comfort.

High läpivetävyys can lead to drafts and heat loss, making a building uncomfortable and increasing heating costs. Conversely, very low läpivetävyys can result in poor indoor air quality due to insufficient air exchange, potentially leading to the buildup of pollutants and moisture. Modern building practices often aim to control läpivetävyys through careful design and construction, utilizing ventilation systems to manage airflow and ensure adequate air changes. Understanding and managing läpivetävyys is crucial for creating healthy and energy-efficient indoor environments. It is often assessed through blower door tests, which measure the airtightness of a building.