HMO Fire Alarms London, Bromley & Kent | 01689 836929
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02.01.2013

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The primary aims of the British Fire Consortium are maintain high quality technical standards of our members and to actively encourage all our members to obtain third party accreditation to ISO 9001 or equivalent approval bodies recognised by the European co-operation for Accreditation (EA).

HMO FIRE ALARM SYSTEMS

Kent Fire Alarms - Fire Alarms and Emergency Lighting
If there is one common factor that applies to virtually all HMOs, it is that the budget for the fire alarm installation is invariably tight. This often leads to the conclusion that a conventional or mixed system (a system comprising of a mix of conventional and mains powered detectors) is the only choice. The chances of the budget running to a sophisticated addressable fire alarm system are, for all practical purposes, virtually zero.

However, conventional systems offer very limited functionality and, particularly in HMOs, this often means that they produce many unnecessary alarms - for instance from burning toast or cigarette smoke. Not only are these alarms disruptive, but there is also a high probability that all alarms will be assumed as unnecessary, and genuine alarms will be ignored.

Regulations
Due to the issues experienced with conventional systems, BS5839 Part 6 was devised to cover the installation and maintenance of fire detection and fire alarm systems in dwellings. This document defines the type, operation and coverage required of systems in HMO applications. It is a common misconception that only BS5839-6 applies in HMO applications, in reality Part 6 must be used in conjunction with BS5839 Part 1 (The general code of practise for fire alarm installations). BS5839-6 states that the communal areas of the HMO require a system complying to Grade A (in effect a BS5839-1 compliant system) be fitted to cover all common areas as defined in BS5839-1 for level L2. The dwellings themselves are then given coverage specification within BS5839-6 that depends on the age of the building (new or existing) and physical fire protection installed. Generally this allows for mains interlinked devices to be fitted within the dwelling itself and this has resulted in the uptake of what are commonly defined as, “Mixed Systems”.

These systems reduce the effect of unwanted alarms by fitting mains interlinked detectors throughout the flat or apartment. A single heat detector and sounder connected to a conventional fire alarm system are then fitted within the entrance to the apartment. The theory behind this is that the effect of any unwanted alarm is contained within the apartment while a true fire condition will grow to activate the conventional heat detector and evacuate the building. While mixed systems go some way to mitigating the risk of unwanted alarms they do introduce new considerations; a real fire for instance is likely to result in the loss of a large area of the apartment before the main system will activate.

Alternatives

There is a fire alarm system more versatile than a conventional system that offered the same unwanted alarm mitigation as mixed systems and was far less costly for small installations, than an addressable system? In fact, there is - the two-wire or bi-wire system. Components for two-wire fire alarm systems cost only a little more than those for conventional systems, and there are big savings to be made on installation costs. This is because two-wire systems use inexpensive cabling and the detectors, manual call points, sounders and beacons all share the same cable.

The control panels for two-wire systems are typically available with four or eight zones. A four-zone panel is a good choice, for example, in an HMO with three apartments, since each apartment can have its own zone, while the fourth zone is allocated to the hallways, stairways and other communal areas.

While it won’t show which individual detector has been operated, this arrangement will show in which apartment the actuation has taken place and, in the best systems, it will also show whether the actuation originates from an automatic detector or a manual call point.

For example, in an HMO, one of these sophisticated two-wire systems could be configured so that a fire signal from any manual call point or from an automatic detector in the common areas instantly triggers sounders and beacons throughout the premises, whereas a fire signal from an automatic detector in one of the apartments triggers the sounders and beacons in that apartment only. If, however, the fire signal from the apartment persists for, say, one minute, the alarm is then raised throughout the premises.

This is a huge benefit, as a fire signal from a single apartment may well indicate nothing more than someone has burned their supper or lit up a cigarette. In such cases, raising a general alarm is unnecessary and disruptive. Incidentally, this mode of delayed alarm operation complies fully with BS5839-6 Section 9.1.5 Mixed Systems and also allows the communal areas to, at the same time, comply with BS5839-1.
Another valuable feature of good two-wire alarm systems is their use of dual-function detectors that incorporate both smoke and heat sensors. These are usually factory set to give a balance between the detection functions that, in typical situations, provides a fast response to real fires while minimising the risk of false operation.

However, not all situations are typical, and the best of these dual function detectors allow the installer to adjust the balance between heat and smoke detection to suit the operating environment. Once again, this can be very useful in HMOs.

In summary, the latest two-wire fire alarm systems, Fike’s TwinflexPro, offer important benefits for applications in HMOs. They’re versatile, they can respond selectively to alarm signals, and they use detectors that can be fine-tuned to suit their operating environment. As well as all of these benefits, in most cases they actually cost less to install than a basic conventional system.

Please see the link for more information regarding the regulations and government guidelines.

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/14884/fsra-sleeping-accommodation.pdf

For further information please give us a call on 01689836929 or email us your enquiry.

We understand the challenges that business face and know from experience that an unforeseen setback can be critical to the future of your business. 80% of business affected by a major incident such as fire, will never reopen or fail within 18 months. We therefore appreciate that effective management of business risk is critical to the success of your business. As an employer in whatever type of business you operate, you will be responsible by law for the protection of the health, safety and welfare of your employees.

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We can advise on all types of fire alarm system, the installation and location, we can design new systems, upgrade and maintain those already installed.

We design and install the emergency lighting systems that guide you to safety and we can supply and fit ancillary systems such as smoke venting, air sampling, automatic door releases and fire suppression systems.





Fire Alarm Installations and Maintenance
Domestic and Commercial Fire Alarm Systems
Conventional Fire Alarm System (Non-Addressable)
Addressable Fire Alarm Systems
Wireless Fire Alarm Systems
Emergency Lighting (Maintained and Non-Maintained
Fire Exit Signs (Maintained and Non-Maintained)
Heat and Smoke Detectors Alarms
Fire Alarm Call Points
Magnetic Smoke Door Holders: Wall or floor mounted
Fire Risk Assessment


We provide free, no obligation quotations and can carry out property Fire Risk Assessments.

manufacturers:

We install, maintain and commission Fire Alarm Systems and Emergency Lighting from the following manufacturers:

Advanced Electronics
Alarmtronic
AlarmSense
Apollo
Cooper Firedex
C-Tec
Fike Rafik TwinFlex
Gents Xenex
Haes Systems
Hochikii
JSB Firedex
Ken-Tec
Morley

Other Services:

Quality electrical services covering London and the South East

With experience gained through installing and maintaining fire protection systems and security systems, we're able to offer dedicated electrical services. carried out by anyone of fully qulaified electrical engineers.

Our qualified electrical engineers offer a wide range of services, including, electrical installations, rewiring and maintenance.

Our electrical work includes:

PAT testing
Electrical Rewiring
Electrical Installations
Fuse box Installations
Lighting and Power Installations
Electrical Maintenance


All Electrical Installations

Contact Kent Fire Alarms

For a free quotation and additional information about any of our fire and security alarm installation services, contact us using the details below.

Telephone: 01689 836929 or 07904 723300

Email: sales@kentfirealarms.com

Kent Fire Alarms is a Group of Companies, comprised of Kent Fire Alarms of Bromley in Kent, operating as Alarmwise ( alarmwise.co.uk )

Office Hours:

Monday - Friday: 8am - 5pm
We provide a 24 hour call out service for contracted customers.


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In the event of a detector or callpoint being activated, the panel is able to determine which circuit contains the triggered device and thereby identify which zone the fire alarm has come from.

It is then necessary to manually search the indicated zone to pinpoint the exact cause of the fire alarm.

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The philosophy of a conventional system revolves around dividing the building into a number of areas called zones the detectors and callpoints within each zone are then wired on dedicated circuits.



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Greater London Area
Barking and Dagenham, Barnet, Bexley, Brent, Bromley, Camden, City of London, City of Westminster, Croydon, Ealing, Enfield, Greenwich, Hackney, Hammersmith and Fulham, Haringey, Harrow, Havering, Hillingdon, Hounslow, Islington, Kensington and Chelsea, Kingston, Lambeth, Lewisham, Merton, Newham, Redbridge, Richmond, Southwark, Sutton, Tower Hamlets, Waltham Forest and Wandsworth. Surrey Area Camberley, Dorking, Egham, Epsom, Esher, Farnham, Godalming, Guildford, Haslemere, Horley, Leatherhead, Redhill, Reigate, Staines, Walton on Thames and Weybridge.

Essex Area

Basildon, Billericay, Braintree, Brentwood, Chelmsford, Colchester, Epping, Grays, Hadleigh, Halstead, Harlow, Harwich, Ilford, Loughton, Maldon, Rayleigh, Rochford, Romford, Southend on Sea, Thaxted, Tilbury, Waltham Abbey, Walton on the Naze, Wickford and Witham.

Kent Area
Ashford, Broadstairs, Canterbury, Chatham, Crayford, Dartford, Deal, Dover, Edenbridge, Erith, Faversham, Folkestone, Gillingham, Gravesend, Herne Bay, Hythe, Lydd, Maidstone, Margate, Orpington, Ramsgate, Rochester, Sandwich, Sevenoaks, Sheerness, Sittingbourne, Southborough, Strood, Swanley, Tenterden, Tonbridge, Tunbridge Wells, Westerham and Whitstable.

Surrey Ares
Camberley, Dorking, Egham, Epsom, Esher, Farnham, Godalming, Guildford, Haslemere, Horley, Leatherhead, Redhill, Reigate, Staines, Walton on Thames abd Weybridge.

Sussex Ares
Burgess Hill, Crawley, East Grinstead, Horsham, Berkshire, Bracknell, Maidenhead, Reading, Slough and Wokingham.