Salus Engineering International performs ventilation testing on systems with primary, secondary and supplementary exhausts. The primary method of testing is with tracer gas, which is used to model the normal operation, fault conditions, and maintenance activities that may occur on a system using hazardous chemistries. This includes toxics, flammables and pyrophorics. An alternative methodology is with live chemistry, with which the group also has extensive experience. Our engineers are experienced in practical applications as well as safety requirements, to ensure basic safety concerns are satisfied. The challenge is not only to test ventilation systems, but also to provide valuable input into how they can be improved, to ensure they perform their vital functions and aid in improving their efficiency.