Automatic fire detection systems must be installed and maintained, making sure that tenants are alerted and able to evacuate the house safely. It should be designed to be able to wake people who are sleeping and alert them to the presence of a developing fire.
Licence holders have a duty to make sure that smoke alarms are in proper working order at the start of each new tenancy and that they are checked every six months. Licence holders will need to gain a servicing certificate to prove regular servicing.
Type and Grade
AFDs are described by type and grade. Type refers to the parts of a property that the AFD covers, as described in the table below.
AFD Type |
Coverage |
LD1 |
a system installed throughout the premises, incorporating detectors in all circulation areas that form part of the escape routes from the premises, and in all rooms and areas, other than those with negligible sources of ignition, such as toilets, bathrooms and shower rooms |
LD2 |
Oa system incorporating detectors in all circulation areas that form part of the escape routes from the premises, and in all specified rooms or areas that present a high fire risk to occupants, including any kitchen and the principal habitable room |
LD3 |
a system incorporating detectors in all circulation areas that form part of the escape routes from the premises |
Grade A: AFDs comprise of a series of electrically operated smoke or heat detectors which are linked to a control panel that is normally located in the ground floor hallway of a property. The panel should comply with BS EN 54-2: + A1: and the wiring, siting and type of detectors and sounders with BS 5839: part1.
BS 5839 is the British Standard that covers the design, installation and maintenance of fire alarm systems and AFDs should be fitted in accordance with it. Grade A AFDs are appropriate for higher risk HMOs as the control panel constantly monitors the detectors and sounders to ensure that they are functioning properly. If a fault occurs then the control panel indicates this.
Grade C: A system of fire detectors and alarm sounders (which may be combined in the form of smoke alarms) connected to a common power supply, comprising the normal mains and a standby supply, with central control equipment.
Grade D1: A system of one or more mains-powered detectors, each with a tamper proof standby supply consisting of a battery or batteries.
Grade D2: A system of one or more mains-powered detectors, each with an integral standby supply consisting of a user replaceable battery or batteries.
Grade F1: A system of one or more battery-powered detectors powered by a tamper proof primary battery or batteries.
Grade F2: A system of one or more battery-powered detectors powered by a user replaceable primary battery or batteries.