What is a SIT test and why is it important?

Inside every building is a story that is told from many different perspectives. Life within apartment living is complex and join us as we answer all your questions so we can better understand that world a little bit better.  

In this month’s column, we explain what a SIT test is, and its importance …

A Systems Interface Test (SIT) is a comprehensive evaluation to ensure that essential systems are operating safely and efficiently within multi-level buildings. The test focuses on critical infrastructure such as fire safety systems, electrical components, and HVAC (heating, ventilation, and air conditioning)  units. 

Regular SITs are crucial for maintaining safety standards, ensuring compliance with regulations, and optimising the performance of the building’s safety systems. By identifying potential issues early, SITs ensure the ongoing safety and comfort of residents.

Here are some common questions and answers that will help further your understanding of why completing SIT tests is important.

Q: What does a typical SIT test involve?

A: A typical SIT test includes a thorough inspection and functional testing of key systems such as fire alarms, sprinklers, electrical wiring, and HVAC units. The goal is to ensure these systems are operating correctly together and in compliance with safety standards and regulations.

Q: How often should SIT tests be conducted?  

A: SIT tests are usually conducted annually, but the frequency can vary depending on local regulations and the specific needs of the building. Regular testing helps to promptly identify and address potential issues.

Q: Who performs the SIT tests? 

A: SIT tests are performed by your maintenance contractors (HVAC, ESM, Lift, Building Consultant) who have serviced the building throughout the year. These professionals are certified and specialised in building systems and safety regulations, ensuring that the tests are conducted thoroughly and accurately.

Q: Can Commercial Facility Services provide an example of completing a SIT recently, what happened and what was learnt from the process?

A: Commercial Facility Services recently facilitated a crucial System Interface Test (SIT) at one of our sites in Fitzroy, aimed at evaluating the performance of the facility's fire safety and building automation systems. Conducted on August 15, 2024, the test simulated emergency conditions by activating smoke detectors and sprinkler flow switches to assess system responses.

The SIT revealed that while the fire alarm systems effectively triggered alarms, closed fire doors, and opened smoke vents, there were notable delays in the activation of some HVAC systems, which failed to shut down promptly. 

Additionally, elevators did not immediately return to the ground floor, potentially complicating evacuation efforts. The test also uncovered issues with overly-sensitive smoke detectors that led to false alarms.

These findings highlighted the need for better integration between fire alarm and HVAC systems, updates to elevator control protocols, and recalibration of smoke detectors. Addressing these issues will enhance the building’s safety measures, ensuring a more reliable emergency response and improved overall safety for occupants.

Have a question that you would like answered? Submit yours to  [email protected] and stay tuned to future editions. •