Fire dampers are widely-used in HVAC systems where there is a fire-resistant wall in the property. Their purpose is to prevent fire and smoke from leaving one room and travelling throughout the property through the ducting vent. If you have ductwork in a property, then that ductwork should be fitted with fire dampers. Without them ductwork is in essence a potential hazard should a fire break out. They can help turn a small, easily controllable, fire into something that presents a considerable threat to life and property.
Fire dampers should not only be fitted, they should also be tested on at least an annual basis to ensure that they’re working properly. An experienced and competent HVAC commissioning company should conduct a regular inspection to ensure that they remain compliant with legislation and are working as they should.