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Steveo

Difference between a P1 & L1 system

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Hello

Could someone offer some advice with regards to the differences between a P1 & L1 Grade FA system please, I know that the P1 is best for property protection and L1 best for life protection but what are the differences? I would expect both to have full detection throughout the building,  all rooms, escape routes and high risk areas, also I’d expect both to be monitored 24/7 by external provider... thanks for your help in advance.

Steve

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A P1 system will have longer standby battery supply duration and must be monitored. An L1 system has a shorter battery supply duration and doesn't need monitoring (unless high risk such as a care home, hospital, shopping centre or similar)

A P1 system does not incorporate manual call points or sounders (or just a couple of strategically placed sounders) as it's not there for life safety (picture for example a telecommunications transmitter station - it's in the middle of nowhere, is rarely occupied and even when it is is small enough not to need an electrical fire alarm for life safety but it is quite critical to the owner's business that a fire is detected and help sent ASAP).

In many buildings however there is a requirement for the minimum life safety electrical fire alarm system (Category M, just call points and sounders) so if a P1 (or for that matter a P2) is required for property protection only (most buildings don't actually need detection for life believe it or not) in these buildings it has to have call points and full sounder coverage and would thus be a P1/M system (or P2/M) 

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The law only requires life safety, so a P Category system would only be required by an insurance company or as a business continuity decision by the Responsible Person.

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Good stuff, thank you Anthony. Just out of interest, what would you expect in these BNB type rooms to let, & even some hotels now allow remote booking with no reception on arrival. I would expect at least an L2  but then there’s the insurance issue of possibly no one calling the fire service. So as advice should be a monitored L1/L2?

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Sounds reasonable if no staff, the monitoring would be key possibly for life safety too as you can't ensure the fire service would be called or people would evacuate or stay evacuated, contact with the FRS regarding their AFA policy would be advisable too.

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