We've had so many fire false alarms but finally a real one happened. It was raining hard and maintenance closed the top vent to deter water intake. The unit is

We've had so many fire false alarms but finally a real one happened. It was raining hard and maintenance closed the top vent to deter water intake. The unit is a 4 story multi-unit dwelling and luckily someone had a cheap $49 dollar CO detector. The fire came sans alarm and everyone had to evacuate. We were thinking ah man not this again. Someone had some burnt cooking that day. We could only return to our homes until all clear CO detection from the inspectors. My family opted in for the pulse oximetry that the nice fire folk were providing. Needless to say many, including myself, bought CO detectors that week.