Analysis of infiltration by tracer gas technique, pressurization tests and infrared scans.

Reports the investigation of the natural ventilation of three test houses. Describes the houses which were of standard design. Natural ventilation rates were measured using sulphur hexafluoride as a tracer gas. An energy audit was also performed using a fan to pressurize and depressurize the house and an infrared scanner to detect the leakage paths. The tracer gas measurements were converted to a format similar to thepressurization results by using a previously developed model. Gives results in the form of graphs. Finds that the two methods placed the houses in the same relative ranking in terms of leakiness, but the pressurization technique indicated much smaller differences than the tracer gas technique.