EngineeringArchitectural EngineeringBuilding ScienceAir PollutionBuilding PhysicsVentilationAir InfiltrationAir QualityAirflow DistributionBuilding Cooling SystemsIndoor Air PollutionVentilation Performance EvaluationAir Leakage MeasurementAir Leakage ModelingAir Leakage PathwaysAir Leakage TestingLaboratory Air Leakage Testing
Six Canadian office buildings that were tested 20 years ago were retested to determine the changes in their airtightness levels. Of the six buildings, five had been retrofitted to improve airtightness. The results can be used by designers to estimate air infiltration rates for heating and cooling load or energy consumption calculations.