I was mainly referring to commercial detectors that have the horn built into the detector itself, such as System Sensor’s CO1224T. You’re right though: as time goes on we may see fewer commercial CO detectors with horns & more T4-capable notification appliances/systems.
The ones in parking garages usually have their own system with own N/A’s tied into fire. Here we have special CO stop motor signs and the fire system would go off evacuating the area (just parking garage and zones around). The garage CO detectors are more advanced than the ones for indoors. They go with a different range of PPM and also mixed with other gasses these detectors. Siemens also makes these systems.
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So…a completely separate alarm system just for CO detection? Are you going by what’s in Croatia, because I’m not sure I’ve ever seen such a system here.
I don’t know about the signs but pretty sure code here separates different emergencies signaling-wise (i.e. fire signals (particularly those labeled “FIRE”) are to be used only for fire evacuation & nothing else).
Not sure why that would be the case if a fairly standard CO detector should get the job done (aside from maybe increased potential for false alarms due to the outdoor environment & vehicle exhaust) but okay.
I think they mean that it uses the CO detector to assist with fire detection, and not for detection of CO alone. Why a detector would do this, I don’t know.
Oh, yeah, could be: I know some of the models in Edwards/EST’s Signature Optica-series have an inbuilt CO sensor, which is used together with the detector’s other sensors to tell if there’s an actual fire or not (very smart way of doing it indeed).
Yes, this is standard in Canada as well. Most systems in our area are just using CO combo detectors, usually Notifier, and even then, the Garage has it’s own CO system.
The CO system in the garage is also designed with the exhaust fans, so when the PPM of gases or CO gets high enough, it will trigger the large exhaust fans in the garage, which will start to flush out all the air. Majority of them are separated from the FACP, newer and current buildings will have monitor modules for them, that will latch a supervisory on the FACP. Some will also have signals, a newer building I was in had white System Sensor Strobes around labelled ‘CO’.
Exactly the reason, the regular CO detector would go off constantly due to cars starting up and driving by and other things. Hence a smarter system that can detect the different gases and actually know if they are at a dangerous level or not.
Is it possible to adjust the sensitivity in those industrial CO detectors that are used in the garages? If it’s a large space that can hold over a hundred vehicles on a floor without much open to the outside I’d hope there should be a way so it only triggers at above 35PPM or a little higher. EVs have a long way before we’re forced into only being able to buy them.