Low Frequency Fire Alarm for the Hard of Hearing
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Archive for the ‘New products and comments’ Category

UL 217 and listings

Something to be aware of: It is apparently possible for a product to be listed to an earlier edition of the UL/ANSI 217 standard that is not the current one. UL won’t do that of course. Listing to an earlier edition could be a way of circumventing […]

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What is 520 Hz?

Since the end of November of 2013, there has been quite a lot of talk about “low-frequency” and “520 Hz” in audible alarms (or sounders), as states and municipalities begin to adopt NFPA 72, 2010 or 2014 editions, for their building codes. Those editions of NFPA 72 […]

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THE NEW HLAC151

Lifetone is pleased to announce the new model HLAC151. Listed by UL to the current UL 217 standard, and to cUL S531 for use in Canada, and to UL 1971 specifically for the hearing impaired, the HLAC151 is an evolution of the popular HLAC150, but includes some […]

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