How have people been addressing the IFC (2021) Section 907.5.2.1.3.2 requiring 520Hz single/multiple station smoke alarms in residential units being addressed?
It sounds like there are no 520 Hz smoke alarms available on the on the market meet these requirements. We have a roughly 300-unit building and the AHJ is pushing us to put smoke detectors with sounder bases in each unit instead of 120v smoke alarms. We know this could be done, but the cost impacts would be substantial and the future maintenance and inspections in the building would be very difficult. This is the first time we've seen this be pushed by an AHJ, so looking for information on how others have handled this. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
6 Comments
Chad
7/26/2024 08:31:36 am
That’s the only solution right now until they make smoke alarms with LF sounders
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Ricardo Gonzales Jr
7/26/2024 08:54:59 am
There are smoke alarms with the 520Hz available. However, they are more expensive than the older version.
Reply
Chad
7/26/2024 09:00:10 am
Ricardo,
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Jack G
7/26/2024 09:19:26 am
They are not available in my 3 areas that I work in. Online companies that have them on their menu are out of stock.
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Sean
7/26/2024 10:02:01 am
Here was a good article from Jensen Hughes that may be worth sharing with the AHJ or customer. It's from 7 months ago and notes the technology doesn't exist yet, and I've heard that there are outfits trying to develop 120V LF Smoke Alarms, however I am not aware of a product yet. The discussion may go towards justifying the additional cost to include it on the building fire alarm system.
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Brian
7/26/2024 05:57:42 pm
As a third-party acting as the AHJ for several jurisdictions, we basically have not enforced this requirement. Those that have seem to regret go back to the tried and true design.
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