Hmmm, what kind of sensor might be on a car parking level that is pretty deep underground...
Hmmm, what kind of sensor might be on a car parking level that is pretty deep underground... ask 129 Likes 1 Comments Lisa Tomlinson Deysa Dubovecka Based on a quick google this is part of their HVAC system, chances are it's a CO sensor that's connected to the dampers in the garage, when the levels get too high it sends a signal to open the shutters and allow fresh air in.