BS 5839 Part 6 2019 D1 revision Is it retrospective?

Very good explanation from Andy. However there is one area for this standard where it might be retrospective (note my use of the phrase 'might be' rather than is - I don't know the standard well enough to advise).

The title of the standard is Code of practice for the design, installation, commissioning and maintenance of fire detection and fire alarm systems in domestic premises. Where there are changes in the recommended maintenance then a revised standard will generally be applicable (so if it says the testing should now be carried out every six months instead of every year you would do that) but only if it is something that is appropriate.

To relate it to your example (if I have understood it right) the existing detectors will not need to be changed for the new 10 year integral battery types, but if you are installing some new detectors they should comply. However if there is a change in the maintenance regime as a result of this amendment such that the standard says the detectors only need to be checked every ten years then that is only appropriate for the new detector type and the old testing regime would be retained for the detectors currently installed. 

I hope this makes sense.

Alasdair

Very good explanation from Andy. However there is one area for this standard where it might be retrospective (note my use of the phrase 'might be' rather than is - I don't know the standard well enough to advise).

The title of the standard is Code of practice for the design, installation, commissioning and maintenance of fire detection and fire alarm systems in domestic premises. Where there are changes in the recommended maintenance then a revised standard will generally be applicable (so if it says the testing should now be carried out every six months instead of every year you would do that) but only if it is something that is appropriate.

To relate it to your example (if I have understood it right) the existing detectors will not need to be changed for the new 10 year integral battery types, but if you are installing some new detectors they should comply. However if there is a change in the maintenance regime as a result of this amendment such that the standard says the detectors only need to be checked every ten years then that is only appropriate for the new detector type and the old testing regime would be retained for the detectors currently installed. 

I hope this makes sense.

Alasdair