Effect of leakage in buildings on ventilation and energy demand. Rakennusten tiiviyden vaikutus ilmanvaihtoon ja sen energiankulutulseen.

Ventilation losses account for approximately 50% of heat consumed by a building. Treats characteristics of leakage generally. Estimates that decrease of ventilation of building stock in Finland by 0.1 air changes per hour would save about 100 million f marks annually. Provides practical instructions for controlling building leakage rates.