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BS 5839 Part 6 2019 D1 revision Is it retrospective?

DA
Hi,


Hopefully someone can help me with this. I’ve scoured other sources to no reasonable conclusion. 


The latest update to 5839 part 6 says that D1 grades are now recommended in existing and new build HMO buildings.


Does this mean I have to change existing detectors from D2 to D1 i.e. swap out old 9V battery backup ones with new 10 year integral lithium battery types? 


I think it does but then my command of English is not the best. :)



Thanks for any help or advice.


David


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    The general principle for most standards is that they're not retrospective - i.e. they'd cover new work (in new or old installations) but wouldn't automatically apply to existing installations unless there was some alteration or addition - and then would only necessarily apply to the alteration or addition. Occasionally you might be obliged to alter some of the existing installation in order for the new work to comply - but that's really a matter of the scope of the new work rather than the standard applying to retrospectively to the old installation.


    There can be good reasons for 'keeping up with the latest standards' (or thereabouts) - which might be driven by things like insurance requirements, health & safety policy or licensing - but that's a matter for those things rather than the standard itself.


    I'd guess that BS 5839 follows the same general principles as other standards in that respect - but others here will know better than me about that.


      - Andy.
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  • 0
    The general principle for most standards is that they're not retrospective - i.e. they'd cover new work (in new or old installations) but wouldn't automatically apply to existing installations unless there was some alteration or addition - and then would only necessarily apply to the alteration or addition. Occasionally you might be obliged to alter some of the existing installation in order for the new work to comply - but that's really a matter of the scope of the new work rather than the standard applying to retrospectively to the old installation.


    There can be good reasons for 'keeping up with the latest standards' (or thereabouts) - which might be driven by things like insurance requirements, health & safety policy or licensing - but that's a matter for those things rather than the standard itself.


    I'd guess that BS 5839 follows the same general principles as other standards in that respect - but others here will know better than me about that.


      - Andy.
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