Ilmanvuototest

Ilmanvuototest, also known as a blower door test, is a diagnostic tool used to measure the air leakage of a building envelope. It involves sealing the building and then using a fan to create a negative pressure inside, which forces air out through any gaps or leaks. The rate at which air escapes is measured to determine the building's airtightness.

The test is typically conducted by a professional and can provide valuable information about the condition of a building's envelope, including the effectiveness of insulation and the presence of air leaks. It is often used in the context of energy efficiency upgrades, as reducing air leakage can significantly improve a building's insulation performance and energy efficiency.

The results of an ilmanvuototest are usually presented as an air change rate per hour (ACH) or as a blower door coefficient (C). A lower ACH or C value indicates better airtightness. The test can also help identify specific areas where air is leaking into or out of the building, allowing for targeted repairs and improvements.

Ilmanvuototest is a non-invasive and relatively inexpensive method for assessing a building's airtightness. It is commonly used in residential, commercial, and industrial buildings, as well as in new construction projects. The test can be performed on both existing buildings and during the construction phase to ensure that the building envelope is properly sealed and insulated.