Specifications

SMOKE & HEAT ALARMS

Frequently Asked Questions

recommends the use of optical alarms in circulation spaces of a

property, such as hallways and landings and areas in which a likely

cause of ignition of furniture or bedding is by a cigarette. Ionisation

alarms are considered to be more suited for use in rooms where a

fast flaming fire may present a greater danger, dining rooms and

bedrooms being possibilities. The standard recommends that in new

build properties heat alarms should be installed in kitchens and the

‘Principal habitable room’ e.g. living room; in addition to any smoke

alarms used in the escape routes.

Location

They should be sited on the ceiling, close enough to a potential

source of fire so they can respond quickly. The Building Regulations

requires that the installation of self-contained mains powered with

battery back-up Smoke Alarms in all new and refurbished dwelling

houses should, at least, meet the following requirements:

- Within 7.5m of any door to a room where a fire is likely to start.

- On each storey of a multi-storey dwelling.

- All Smoke and Heat Alarms in the dwelling should be

interconnected.

BS 5839: Pt6 broadly supports these recommendations for alarm

systems in existing dwellings, adding that alarms should be sited no

more than 3m from bedroom doors so that they can be more easily

heard if a fire should occur during the night. We would recommend

the fitting of alarms in all rooms (apart from bathrooms and shower

rooms) for the earliest possible response. Very large dwelling houses

may require more elaborate alarm systems and the relevant

sections of BS 5839: Pt6 should be consulted for specific guidance.

One Smoke Alarm in each of the circulation spaces of a property

is the minimum recommendation. This would normally mean the

hallway, and the landings of any subsequent floors. However, the

only way to achieve good coverage is to install an alarm in every

habitable room. Building Regulations requires the installation of a

heat alarm in the kitchen if there is no door separating it from the

circulation spaces. Please note the circulation spaces could be a

lounge or dining room in a property where there is no hallway and

the stairway leads off a living area.

12. Cont...

13. Where should

alarms be

sited?

14. How many

do I need?