I wonder how one could rationally justify the reason for not considering a part 6 detection system suitable for a commercial premises, particularily small to medium sized premises, when it is considered quite sufficient for a dwelling, a catagory of premises in which there is a prolonged sleeping risk, a high risk kitchen, lone occupation, no emergency plan or evacuation strategy, no fire fighting equipment, no fire awareness training, no Fire Risk Assessment, no...........
Are we looking at commercial protectionism?
An answer to your quetsion may lie in Master T's own words, "the problem with formal recognition of a BS5839-6 system for use in workplaces is that it becomes something of a "thin end of the wedge".
There is serious potential for employers to then install smoke alarms or other forms of Part 6 systems as a cheap, sub standard alternative in premises that unequivecally require a proper fire alarm system complying with Part 1.
Thats why to avoid this sutuation Part 6 excludes from its scope any premises used for the purposes other than as a dwelling.
It is worth remembering that the recommendations contained in Part 6 deal with quite complex and engineering related matters, and are not intended for the householder,. Clause 1 makes this clear that the BS is intended for Architects and other building professionals, enforcing authorities, contractors and others responsible for implementing fire precautions in dwellings.