The required notification tone has evolved. Years ago, devices emitted a constant tone generated by bells. Then we moved to the standardized temporal 3 (T3) tone for general evacuation. But now we have CO requirements for […]
Is CO detection an important part of what you do? There are two research projects that may impact future carbon monoxide product certification and installation requirements: one is an Underwriters Laboratories (UL) initiative and the […]
NFPA 72®: 2010 and 2013 require notification appliances for many sleeping areas to emit a 520 Hz square wave. Intended initially for individuals who had trouble hearing higher frequency tones, new systems with low frequency signals will benefit the general population as well.
Currently, 38 states have passed specific carbon monoxide (CO) detector legislation, and more are considering new legislation or updates to existing laws.
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