Paragraph 1.3 asks for all new dwelling houses to be provided with smoke alarms in accordance with the BS 5839-6:2004 to at least a Grade D category LD3 standard. However, table 1 of the BS recommends Grade D Category LD2?
For the purposes of Part B of the Building Regulations an LD3 system is considered to be adequate. The system itself should therefore be installed in accordance with the guidance for LD3 systems in BS 5839-6:2004.
Category: Part B - Fire Safety