Hazmat rooms for storage and dispensing of chemical materials were designed with an exhaust system monitored by the BMS for ventilation faults or out of range negative pressurization. A gas monitor will detect concentrations of 10%, 25%, and 50% of L.E.L. (Lower Explosive Limit) for alarm notification to a "Spill Response Team" or building evacuation and Fire Department calls. If smoke, high heat, or fire is detected in the hazmat room, the control system will close dampers in the supply air and the exhaust air ducts after a 15 second delay to allow occupants to evacuate the room. A panic exit pushbutton and a fireman's override switch were provided for added safety and code requirements.