You need to verify if the property is a HMO with more than one family or just being rented out as a home to one family only. So the use of the property is the important key here. If HMO and over move than 2 floors then its a fully grade A alarm is required within the circulation areas and grade D smokes in occupied rooms. If only renting then a grade D will be accepted. Battery only smokes are not allowed here as the only meet Grade F. Interlinking co with smokes is against regs as the the cause of alarm needs to be identified, Aico and others do manufacture a control unit with silences all smokes and co`s apart from the one which has activated, and this is accepted as a form of identification. Hope this helps
I think it does come under the definition of a HMO, but not a large/licensed HMO. It is 2 floors only, student house with shared kitchen and bathroom, 3 unrelated occupants one of which is the owner/landlord.
This is not new build but an existing property already in use that has had a council visit and survey carried out.
So grade D LD3 required as laid out in BS5839.
Thanks very much for your help