Category: Info

Smoke Alarms And Australian Standard 3786:2014

All smoke alarms sold within Australia must comply to Australian Standard 3786:2014.

Section 4.22.1 of the Australian Standard describes the markings and types of information included on the smoke alarm itself. If the smoke alarm does not have all this information on it – then technically it is non-compliant to the standard.

Photoelectric Smoke Alarm Marking Requirements

Have a look at the photoelectric smoke alarm on your ceiling to double check if it has the following information.

4.22.1 Smoke alarm

Each smoke alarm shall be legibly and indelibly marked with the following:

(a) The number and date of this Standard (i.e. AS 3786:2014).

(b) The name or trademark and address of the manufacturer or supplier.

(c) The model designation (type or number).

(d) The type of smoke alarm (type A or type B), e.g. photoelectric or ionization.

(e) The alarm condition aural signal pattern (ISO 8201 or ISO 7731).

(f) The date of manufacture which may be coded into a serial number or the batch

number.

(g) The recommended date for replacement, subject to normal, regular maintenance

NOTE: Provision may be made for a place to note the date for replacement of the smoke

alarm.

ZEN photoelectric smoke alarm with all required markings as per Australian Standard 3786:2014

Smoke Alarms With 10 Year Battery

For a battery fire alarm incorporating a non-replaceable battery (i.e. 10 year lithium long life batteries sealed inside the unit), the following warning is also required:

WARNING: BATTERY NOT REPLACEABLE—SEE INSTRUCTION MANUAL.

ZEN photoelectric smoke alarm with 10 year battery – compliant with Australian Standard 3786:2014

Photoelectric Smoke Alarms – ‘DO NOT PAINT’ Marking

Additionally, a notice on the outer surface of the enclosure marked ‘DO NOT PAINT’ is required. The letters shall be not less than 3 mm high and plainly visible after the smoke alarm is installed in its intended manner. Be wary of many cheap ‘knock off’ smoke alarms sold in online marketplaces – they do not have all this required information even though they profess to comply to the Australian Standard. Whilst it may seem trivial whether the smoke alarm has this information on it or not, in the event of a house fire and subsequent insurance claim, your insurer could be double checking this same information prior to making any potential pay-out.

ZEN smoke alarm with required ‘DO NOT PAINT’ marking

Photoelectric Smoke Alarm Packaging – Essential Info

Section 4.22.2 of the Australian Standard identifies the information and data which must be incorporated into the smoke alarm’s point of sale packaging (i.e. the box it comes in) and also within the user manual. As before, if the information below is not included then technically the smoke alarm is non-compliant to the standard.

4.22.2 Packaging

The point-of-sale packaging shall be marked with the following:

(a) The model designation (type or number).

(b) The type of smoke alarm (type A or type B) and an explanation of the meaning of the type designation (e.g. photoelectric or ionization).

(c) The nominal sound level output.

(d) The alarm condition aural signal pattern (ISO 8201 or ISO 7731).

(e) For smoke alarms using 520 Hz alarm condition signal frequency, the nominal frequency.

(f) For type B smoke alarms, permanently marked with the trefoil symbol, and name of

radionuclide and activity. The markings shall be visible from the outside of the packaging.

(g) The maximum number of interconnectable smoke alarms.

(h) Statement if the smoke alarm is suitable for wall (vertical) mounting.

ZEN photoelectric smoke alarm packaging is compliant with Australian Standard 3786:2014

Summary

In summary, section 4.22 of the Australian Standard describes the necessary information which must be included on the alarm, packaging and in the instruction manual. It is a requirement which manufacturers and retailers must adhere to.

QLD legislation states that smoke alarms must be photoelectric. They must also be interconnected smoke alarms and conform to Australian Standard 3786:2014. Failure to do so could have implications in the event of any insurance pay-out following a house fire.

Want to know more? Watch our ZEN quick start video or call us on 0478 596 402 today.

We love talking smoke alarms!

ZEN Photoelectric Smoke Alarms

New Farm, QLD, 4005

These new QLD smoke alarm laws have been implemented due to several fires which have tragically resulted in multiple fatalities in each instance.

Coronial inquest findings noted that had each property been fitted with functioning interconnected photoelectric smoke alarms in prescribed locations, the occupants may have stood a better chance of survival.

Early smoke / fire detection improves escape time from a burning building. During a fire emergency, it was not only the heat and flames themselves which presented a life-threatening hazard, many victims were first overcome by an accumulation of smoke and toxic fumes.

Russell Island House Fire – Brisbane 2023

In the early morning of 6th August 2023, Emergency Services were called to a house fire on Russell Island, just off Brisbane’s southeast coast. The cause of the house fire remains undetermined, however it resulted in the loss of six lives – five young boys and their father who returned to the inferno in an attempt to rescue his children. The fire also destroyed two neighbouring homes and left several people needing treatment for burns and smoke inhalation.

The landlord and home owner was subsequently charged and fined for failing to install legally required and compliant interconnected smoke alarms in the Queensland rental property.

Slacks Creek House Fire – Brisbane 2011

Just before midnight on 23rd August 2011, an accidental fire ripped through a house in Slacks Creek, South Brisbane.

The fire was to cause the greatest loss of life in a domestic house fire in Australian history, with a total of 11 people (including many children) perishing due to smoke inhalation.

A finding from the 2014 Coronial Inquest stated that;
‘Once this particular fire started, it is likely that some or all of the deaths would have been prevented if the sleeping occupants had been quickly awoken and had realised that they needed to leave the house as quickly as possible … smoke alarms were either not present in the dwelling or were not maintained’.

Many recommendations from the Coronial Inquest were incorporated into the QLD Building Fire Safety (Domestic Smoke Alarms) Legislation Amendment Regulation 2016.

The legislation itself may be viewed at the Queensland Government website below;
https://www.legislation.qld.gov.au/view/pdf/asmade/sl-2016-0221

Palace Backpackers Fire – Childers 2000

On 23rd June 2000 at 1am a disgruntled resident deliberately lit a fire inside the Palace Backpackers Hostel in Childers, southeast Queensland.

The fire spread rapidly throughout the old timber building and the hostel did not have working smoke detectors or alarms. The result? 15 young people sadly lost their lives. The arsonist was captured by police and sentenced to life in prison. The devastating effect of this event is still evident on the local township to this day.

Want to know more? Watch our ZEN quick start video or call us on 0478 596 402 today.

We love talking smoke alarms!

ZEN Photoelectric Smoke Alarms

New Farm, QLD, 4005

Before buying an interconnected fire alarm you should do your due diligence to ensure it is compliant to Australian Standard 3786:2014. The full name of the standard which encompasses smoke alarms in Australia is ‘Australian Standard 3786:2014 Smoke alarms using scattered light, transmitted light or ionization’ (incorporating amendment 1 and 2). The first of this two part series will review Australian Standard 3786:2014 to assist your purchasing decision.

Australian Standard 3786:2014

Standards are documents that set out specifications, procedures and guidelines to ensure products are safe, consistent, and reliable. Australian Standard 3786:2014 is referenced by QLD’s Building Fire Safety Regulations 2008 – when a standard is referenced by state or national legislation, compliance with it becomes mandatory. It is interesting to note that although there is a newer Australian Standard 3786:2023 – it is not yet referenced by legislation – therefore Australian Standard 3786:2014 must still be complied with in the eyes of the law.

Australian Standard 3786:2014 is divided into several key components – the two of interest that will be reviewed in this article are ‘tests’ and ‘general requirements’.

Section 4.17 of the Australian Standard states that; ‘The smoke alarm shall be so designed that a sphere of diameter larger than 1.3 ±0.05 mm cannot pass into the sensor chamber(s)’. This requirement is intended to restrict the access of foreign bodies such as insects into the sensitive parts of the smoke alarm (to prevent nuisance alarms). It is known that this requirement is not sufficient to prevent the access of all insects; however, it is considered that extreme restrictions on the size of the access holes may introduce the danger of clogging by dust, etc.

Smoke Alarm Photoelectric Chamber – Insect Screen

How does this requirement translate into the design and manufacture of your photoelectric smoke alarm? The image below shows the compliant internal component from a ZEN wireless interconnected photoelectric smoke alarm. The polymer mesh screen surrounding the sensitive photoelectric chamber within the alarm contains thousands of tiny holes, each perfectly engineered, no larger than 1.3mm in diameter. The tiny holes prevent most insects from accessing the internal chamber whilst still allowing air (and smoke) to pass through.

Mesh screen surrounding the photoelectric smoke alarm internal sensor chamber

As per Australian Standard 3786:2014 – holes must be no larger than 1.3mm diameter

In addition to this internal mesh screen around the perimeter of the photoelectric chamber, the wireless interconnected photoelectric smoke alarm also has an outer grill which forms part of the housing of the alarm. The external grill also prevents larger foreign bodies from entering the alarm itself. Foreign bodies (i.e., insects) are a common cause of false / nuisance alarms because they can enter the sensitive internal components and disrupt the photoelectric light beam.

We hope you have enjoyed this review of Australian Standard 3786:2014 and how it translates to the design of your interconnected fire alarm. Whilst many smoke alarm retailers might profess to be aware of the standard, very few can claim to have read it from cover to cover or have a genuine understanding of what it really means.

Want to know more? Watch our ZEN quick start video or call us on 0478 596 402 today

We love talking smoke alarms!

ZEN Photoelectric Smoke Alarms

New Farm, QLD, 4005

Nothing is more frustrating than interconnected smoke alarms going off for no reason (especially at 2am in the morning!). But why is your smoke alarm beeping when there is no smoke? There can be several causes of nuisance alarms. The good news is that you don’t have to go on living this way – our ZEN wireless interconnected photoelectric smoke alarms provide reliable protection for you and your family!

The basic operating principal of an interconnected photoelectric smoke alarm is that it activates when the light beam inside the smoke alarm chamber is broken or disrupted – typically by tiny smoke particles. However these foreign particles can come from sources other than real smoke too – below are some of the most common examples and how to resolve them.

High Humidity Affecting Your Smoke Alarms

High humidity may occur naturally as the air carries dense moisture particles that your smoke alarm confuses for smoke particles. Although brands can differ, interconnected smoke alarms should be designed to work up to 93% relative humidity – anything over this range and the air could become dense enough to scatter the light beam of a photelectric sensor. Extreme tropical weather conditions in far north Queensland and the Northern Territory can sometimes produce high humidity above 85% which may begin to affect an alarm.

High humidity may also be created artificially due to steam vapour from a bathroom shower, or a clothes dryer operating in a laundry room for example. If your smoke alarm is positioned outside a bathroom entrance or in a laundry consider moving it further away or relocating it completely so that escaping shower steam and dense air vapour doesn’t trigger nuisance alarms and start the smoke alarm beeping unnecessarily.

Insects Inside Your Smoke Alarm

Section 4.17 of Australian Standard 3786:2014 requires all smoke alarms to have protection against foreign bodies, so that a sphere of diameter larger than 1.3mm cannot pass into the sensor chamber – this protection is provided by way of an internal mesh screen. Despite this requirement it is still possible that very tiny insects (smaller than 1.3mm) could enter the smoke alarm and by doing so interfere with the photoelectric sensor. One tip to reduce this likelihood is to wipe the ceiling perimeter around your smoke alarm with surface insect spray (being very careful not to allow the insect spray itself to touch the alarm as this may affect the internal sensors).

Dust Inside Your Photoelectric Smoke Alarm

A build-up of dust in the air may also affect your interconnected smoke alarms. If dust particles enter the internal chamber they will interfere with the photoelectric light beam and trigger nuisance alarms. We recommend cleaning your interconnected smoke alarms regularly by gently vacuuming around them with a soft brush attachment from your vacuum cleaner. Cleaning your interconnected smoke alarms in this way may remove any cobwebs which could also prevent pests from entering the alarm. Be cognisant of any activities in the home which may create excess dust – for example renovations, or shaking out old dusty blankets or doonas in a room which has a photoelectric smoke alarm installed.

Cooking Smoke Affecting Your Smoke Alarm Sensors

It is true that whilst many house fires start in the kitchen, installing an alarm in the kitchen may also elicit many nuisance alarms and start the smoke alarm beeping unnecessarily. It doesn’t matter what brand of smoke detector you have, if you install it too close to the kitchen stovetop or oven it will activate when smoke particles are emitted from the cooking food (after all, the smoke alarm is just doing what it is designed to do). When cooking, be sure to use the oven exhaust fan or rangehood to draw smoky air particles away from the vicinity of your smoke alarm. If the problem persists, consider repositioning the alarm further away from the cooking appliance.

Conclusion

Beeping smoke alarms without an obvious apparent reason can be both frustrating and stressful. Worse, repeated false alarms may induce a ‘boy who cried wolf’ syndrome and reduce home occupants reaction to a real life fire event.

Fortunately, our ZEN wireless interconnected photoelectric smoke alarms undergo strict quality control measures and are manufactured at an ISO 9001 quality accredited facility, in adherence to Australian Standard 3786:2014, and are independently tested and verified which help reduce the likelihood of nuisance smoke alarms. Using the tips outlined above and below, your interconnected smoke alarms will provide many years of stress free and reliable fire protection.

For more information about why your smoke alarm is going off no reason, please refer to the handy smoke alarms diagnostic checklist below!

Want to know more? Watch our ZEN quick start video or call us on 0478 596 402 today.

We love talking smoke alarms!

ZEN Photoelectric Smoke Alarms

New Farm, QLD, 4005