Michael Brown
SAWHORSE
The IMC allows for intermittent control of a parking garage ventilation system if a CO/NO2 system is installed. Florida amended that code section to specify that the NO2 sensor be mounted 12 inches below the ceiling. This amendment favors a specific manufacturer who's installation instructions recommend the same location. Other manufacturer's specify that the NO2 sensor be installed in the breathing zone. The code also states that the sensors shold be installed in accordance with the manufacturer's instructions but in this case, that would not comply with the location specified in the code. Which part of the code takes precedence, the specified location or the manufacturer's instructions?