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Honeywell SF450EN Carbon Monoxide Alarm

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6 Reviews

Brand: Honeywell / Product Type: Smoke Detector

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    6 Reviews
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      20.02.2013 18:51
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      Thanks For Reading

      Carbon monoxide (often shortened to CO) is a toxic gas that is colorless, odorless, and tasteless. It is dangerous to both humans and animals alike if it's allowed to reached high enough levels. CO gas is formed by the incomplete combustion of fuels which included natural gas used in the home, and CO poisoning can easily result in death with levels of only 1,600 PPM (0.16%) being often fatal #figure obtained from Wikipedia#

      An CO detector such as this model from "Honeywell SF450en" (sometimes seen as H450EN but they are the same item) is therefore just as important to have in your home as a smoke detector as offers both an early warning and a safe guard against CO poisoning.

      Instructions are included and are clear to both read and understand. The booklet gives you advice on where to put the detector as well as a problem shooting guide. Unlike some models you do not need to wall or cealing mount this detector and it can sit on a shelf, but ideally next to something that can potentially leak CO gas such as your gas boiler or gas fire. It only took a matter of minutes to open, pull out the battery tab and have the device up and running without any problems.

      The detector is very reliable and is more than happy to sit for a number of years silently protecting you from that silent killer without needing any input from yourself with it's own "Continuous Self-Test Function." You also have the option to test it manually by a push button on the device which produces a loud siren (one that's very different to smoke detectors so you won't get them confused.)

      Build quality is great and thankfully the unit itself is pretty compact meaning it doesn't stand out a mile. You can get mains powered detectors but these tend to be more expensive and have to be wired in usually to an electrical socket or light fitting. In that respect and in terms of installation battery detectors such as this one have an advantage. The battery included is said to have an average life of six years but should it be failing it will beep every 30 seconds to get your attention.

      This detector can often be found for sale at around £15.00 and includes the battery. With a 5 year guarantee that's really a small price to pay for something that may save your life. I can't think of any reason why you wouldn't want one of these in your home.

      (I'm a reviewer on Amazon, and some my reviews are copied from there to dooyoo. Please feel free to check out my Amazon profile under my real name of Mr Andrew M Kerr.)

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      29.05.2012 09:17
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      Can save your life

      When we moved into our cuirrent property about 12 years ago within two days our boiler packed up, i'm pretty sure the previous owners knew it was faulty and never told us and left us to pay for a brand new boiler, it proved almost impossible to find a local tradesman who would do the work so we ended up using British Gas to do all the work, as part of the job they installed a carbon monoxide detector identical to the one in teh picture however the only difference is that it has the British Gar branding on the front rather than Honeywell however on the back it is marked as being made by Honeywell on behalf of British Gas and everything else is identical.

      A carbon monoxide detector is just as important as having smoke alarms in the property as it is a gas than can kill as well as causing some general discomfort in the form of headaches and dizziness however it is the fact that it can be fatal in realtively small levels of concentration that is the most relevant fact. The monitor itsef is battery powered and has a life of 7 years on average, we are now on our second one as the original was replaced as part of our regular service about 3 years ago.

      The alarm is easy to secure to the wall and should be located close to your gas boiler, ours in on the outside of teh wall just by the closet that the boiler is located. There is a test button and two led lights and the alarm when tested is a high pitched sound that would wake the dead. There is a red and green led light and the red one when lit signifies that there is either an issue with the alarm or acts as a warning. A flashing green light means that everything is ok and this goes off every minute or so which means you know that the power supply is ok.

      There is an audible sound when there is a fault, a persistent beeping noise and on the cover there is a guide as to what the frequency of the beep means, such as whether the problem is with the battery or the detector. A continuous noise menas you need to open some ventilation, exit the building and call out the gas board.

      A device like this gives you peace of mine, we try and ensure we test ours every few months which is probably not as frequent as the manufacturer recommends but it is one of those things that you kind of forget is there but it is an essential item to have in the home if you have gas appliances.

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        19.05.2012 21:37
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        A life saving alarm that you can simply forget about about once installed (for 7 years anyway!)

        Living in a privately rented apartment it is the landlords/estate agent's duty to make sure that the flat is sufficiently protected against carbon monoxide poisonous gas. To do this they must ensure that there are sufficient alarms fitted to alert you if there is a gas leak or any detection of the gas. We currently have two carbon monoxide alarms in our flat, one in the spare room and one in our airing cupboard (where our boiler is).

        Carbon Monoxide

        Carbon monoxide is an odourless, colourless, non-irritating and tasteless gas that is produced when there is not enough oxygen in the air to produce carbon dioxide. This if inhaled for a prolonged length of time can be fatal. In nature it can be produced during forest fires and volcanic events and in the domestic setting from ovens, heaters and propane filled equipment.

        Carbon monoxide is not always easy to detect due to its physical properties and carbon monoxide poisoning likewise. The effects are also often not seen until it is too late and a fatal event has occurred. Some shocking statistics are that 0.16% carbon monoxide air concentration will result in death in less than 2 hours. Other symptoms of carbon monoxide poisoning are:

        Dizziness
        Loss of judgement
        Headaches
        Nausea

        All too often I go onto BBC News webpage and read a horrific story about fatal carbon monoxide poisoning in a household. Luckily ours are provided and checked for us, but every home should have at least one of these installed and for the small price tag there really is no excuse.

        Honeywell SF450EN Carbon Monoxide Alarm

        We did not pick this carbon monoxide detector, but they all have the same function and hopefully lifesaving result. The Honeywell SF450EN is an officially approved and certified carbon monoxide detector alarm (Kite marked).

        The alarm is white in colour and made of a thick plastic material. It is surprisingly heavy to hold weighing nearly 100 g. The unit has approximate dimensions of 14 cm length x 10 cm width and 2.5 cm depth and is roughly rectangular shaped with slightly curved edges. As this was installed for me I did not see the packaging.

        The front of the alarm is very simple looking with a single button saying 'Test'. This is there to check that the alarm is working, you hold in the test button and the alarm sound will go off if the unit is in full working order. You hold it in again to stop the alarm, which is VERY loud and would certainly wake you up if there were a carbon monoxide leak!

        Next to the Test button are two LED lights, one green and one red. These again are to show if there is a problem with the device and I guess for the hearing impaired. The green light should flash every minute just to show that the alarm is working and that it has power and it is doing its job. The red light goes off if the unit is coming to the end of its life and if carbon monoxide is detected in your home. It is very simple to use, you simply turn it on and leave it and hope you don't have to worry about it for a few years.

        The front of the carbon monoxide detector has a flip down cover which has lots of useful information inside. If your alarm starts to make chirping sounds it tells you:

        1 chirp per minute = A battery fault
        2 chirps per minute = Detector fault
        3 chirps per minute = End of detector life
        5 chirps per second (continuous) = Carbon Monoxide present

        It also has some short but useful material on carbon monoxide and what to do if it is detected in your home including the gas emergency service phone number and what to do if the alarm does detect the poisonous gas.

        The back of the unit has the manufacturers details and a replacement date which for me is June 2016. There is a small hole for you to hook the device on a wall in a room or you can simply put it on a shelf or conceal it behind a photo out of sight. As long as it is somewhere reasonably open in your home it will detect any signs of carbon monoxide.

        The unit comes with a 6 year guarantee and estimated battery life of 7 years (these are included). These cost £18 at Amazon at the time of writing and spread over the years it lasts is a very small price to pay for peace of mind. If you rent a property you landlord should provide these alarms for you! It really is not worth the risk.

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          13.11.2010 14:24
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          A mustfor every home

          Intro

          During a rewiring by our local housing association we had a mains wired carbon monoxide alarm fitted, and for a while it worked fine or so we thought. Recently it started going off on a regular basis so we called the emergency number for gas leaks and an engineer called.

          He checked everything out and tested the unit to ensure it was in proper working order. A few weeks later it started doing the same again, so another call was in order. Again an engineer came and done all the same test as the previous engineer, except this time he also checked the small battery operated one which is installed by the boiler. He found no leaks but didn't think the mains unit was functioning correctly.

          He left and said he would return after checking something out. He duly returned and disconnected the mains unit informing me that there had been a lot of failures lately of this type of unit and that it had been decide to make them obsolete.

          Having done his bit he said he was going to install another detector in a more suitable place since it was his belief that the mains unit was not in a good position to quickly detect any leaks.


          Carbon Monoxide

          Carbon monoxide is a poisonous gas, which has no smell, making it ever so dangerous. It is produced by central heating systems burning fuel in an area where there is insufficient oxygen. If oxygen is aplenty then the by-product of burning the fuels is carbon dioxide other wise it is carbon monoxide, which is produced. It is therefore critical to ensure that there is sufficient oxygen around your heating system to prevent this occurrence.

          The symptoms of carbon monoxide poisoning can vary significantly but a headache, dizziness and nausea are commons signs. If this is followed by tiredness and vomiting then you should obviously in the first instance get if possible into an environment where there is plenty of fresh air. In doing so in most cases this will alleviate the symptoms and all will be well. If the symptoms persist obtain medical assistance as soon as possible. When feeling well enough you should secondly have your carbon monoxide levels checked by a qualified engineer, and have any necessary repairs carried out. If you are concerned about any of this then a simple blood test can easily reveal whether you are indeed suffering from carbon monoxide poisoning.


          Honeywell Detector

          The unit is larger than some others I have seen but if nothing else it does look as if it is certainly fit for the job. It is I guess pretty much basic in shape with both side sections being ever so slightly curved so as to form a kind of curved trapezium. There is a round segment portion to the right of the front face and this resembles a speaker so this is where the sound will come from sound the worst case scenario occur.

          There are LED (light) indicators, which tell you the unit is operational and functioning, as it should. They are red and green, and it is the green one, which indicates that there is power to the unit; the other red one is the prime indicator of the alarm being activated.

          Even though it was installed by an engineer from the housing association it did come with comprehensive instructions as to how and why it operates as it does. In the main in runs silently in the background checking carbon monoxide levels, should the y reach a predetermined level the alarm will sound and you should follow the procedure as described above.


          Summary

          If your central heating has been installed correctly this is not going to be a problem, a quick check will certainly be advantageous and if you do not already have such a device installed for a small outlay of £15.99 you can rest assured. Since this gas is odourless it is obviously a serious problem when sleeping if things have not been fitted correctly so I do think that such a device is A MUST.

          Without seeming to be scare mongering I cannot emphasise enough how deadly this gas can be and although feeling sick and nauseous is bad enough should the gas level increase during sleep time then it's curtains time. So if you do not have one GET ONE NOW lets all have a safe nights sleep.

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            01.07.2010 22:00
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            An essential

            When I was younger, I had a boyfriend, Charlie . Every time I would stay over at his house, I would wake up dizzy with a headache . We laughingly suggested that I was possibly allergic to him - but it wasn't so funny when a gas safety check at his house revealed that the gas fire in his bedroom had been pumping out carbon monoxide - my dizziness and headaches were actually symptoms of Carbon Monoxide poisoning, and I was very lucky the leak had not been larger .

            Carbon Monoxide is an invisible, tasteless and odourless gas, poroduced by incomplete burning of carbon based fuels, such as gas, oil, and solid fuels. When CO enters the body, it prevents the blood from bringing oxygen to cells, tissues, and organs.

            In the year 2008/09 , 15 people died from Carbon Monoxide poisoning. Levels that don't kill can still cause serious harm, in some cases requiring hospitalization, and in extreme cases can cause paralysis and brain damagewith .

            Since then, I've naturally been concerned about carbon monoxide, nso of course I have a Carbon Monoxide detector in my home . You can get little sticky disks that change colour when carbon monoxide is present, but I decided that these would be pretty much useless unless I glanced at them every day, and opted for a battery operated alarm that would actually make some noise if there was a problem.

            I purchased the Honeywell Carbon Monoxide Detector, a small beige plastic device that attaches to the wall. It has a built in battery, guaranteed for six years, and a small green flashing light that blinks reassuringlyat one minute intervals to let me know my alarm still has plenty of battery left, and a red light that will flash continously if there is any CO. It also has a test button - a useful feature as I can remind myself and my daughter on a regular basis of what it sounds like. It's very loud, and the pattern is different to that of my normal smoke alarm.

            The instuctions state to place this near to gas, oil, or solid fuel burning appliances . The only appliance I have really is a gas fire, but houses with plenty of gas appliances may need to buy more than one for added reassurance - which could be quite expensive, as these cost around £20 - although thats a small price to pay for safety.

            One of the best things about the alarm is that on the inside of the lid (which opens easily) there are simple instructions of what to do in the event of a CO leak being detected . These are all pretty straightforward - calling the gas emergency line, opening windows and doors for ventilation, and getting out of the house - but again, this list helps to ensure that I can teach my young daughter what to do if the alarm goes off . I particularly like that they include the number, as it's not something I'm likely to remember off the top of my head if the alarm actually goes off .

            Apparently, the alarm will chirp once the battery begins to get low - though so far that hasn't happened .

            The alarm comes with a handy and easy to read manual that not only tells you where and how to install the alarm, but also what to do in the event of the alarm sounding, and clearly explaining what carbon monoxide is and what it does. It's an excellent manual , neatly and clearly laid out with diagrams that help to make sense of the text .

            Overall, I'm very happy with this alarm. I've had it for about 5 and a half years now, and thankfully it has never sounded once. It's a great little piece of reassurance though, and I would recommend every home have one . These cost round about £20 online - some places do sell them a little cheaper, but look out for delivery charges .

            Highly recommended - an essential bit of kit!

            For more information about CO, wisit this website :
            http://www.hse.gov.uk/gas/domestic/co.htm

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              08.08.2009 12:15
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              Less than £20 buys me peace of mind

              I believe every home should have a carbon monoxide detector, several years ago a freak accident occurred in the home of family friends where a birds nest blew into the chimney during a storm causing a build up of carbon monoxide which killed one person and hospitalised another two. These were people who were healthy and the gas boiler had been serviced just the week before and the fact that a young man lost his life was a tragedy.

              Carbon monoxide is a colourless and odourless gas which is produced when fuels like gas or coal burn incorrectly. Low dose Carbon monoxide poisoning can be responsible for vague symptoms like headaches, palpitations and nausea but at higher does it can kill in a few minutes and is responsible for causing 504 accidental deaths in the UK over a 13 year period from 1995 to 2008. You can help to keep your family safe by making sure that your gas appliances are serviced yearly and that they are adequately ventilated but a carbon monoxide detector will help to give you extra peace of mind.

              There are a few types of carbon monoxide detectors out there, the cheapest are simply dots on a piece of card which change colour in the presence of the gas but are not going to be much use if you are fast asleep. I much prefer to have a more sophisticated battery powered detector which both flashes and makes a noise in the even of carbon monoxide gas being present which will catch my attention even if I am asleep or in another room.

              The Honeywell SF450EN carbon monoxide detector is a small cream coloured unit smaller than a standard smoke alarm which hangs on my wall and gives me peace of mind. It has a built in battery which is guaranteed to last for six years and during that time a small green led blinks unobtrusively to let me know that the detector is in good working order. The unit continually tests the air using electrochemical cell sensing technology and if it detects the presence of carbon monoxide it beeps in the morse code pattern for CO. I certainly would not recognise morse code but I can tell you that the alarm is extremely loud and piercing and I am confident it would waken me up if I was asleep in another room allowing me to get my family out of the house. The morse code may be of use to emergency services alerting them that CO is present.

              I like the fact that the fitted battery is guaranteed to last for 6 years as it means that I never have to bother changing a battery and I am free to hang it on any wall without having to place it near a mains socket. There is a button you can press to test that the alarm unit is still working that lets you hear the alarm and if the detector is faulty or nearing the end of its life then it chirps once a minute letting you know to replace the unit.

              In the event of a CO leak the detector has handy instructions about what you should do, simple instructions like opening windows and doors, turning off appliances, phoning the gas emergency line and getting out of the property. I like the fact the instructions are there because in the event of an emergency then you might panic and forget and having a written reminder especially of the gas emergency number which few of us know off by heart is very handy. It would also be useful for a guest in your home who did not know what the detector is for letting them know what to do if it goes off.

              The unit lasts for a minimum of six years and near the end of the detector life it chirps once a minute to alert you of this fact. This is the only thing I don't like about the unit as when my old detector started chirping there was no way of turning this noise off and like the alarm it is pretty loud. I ended up wrapping the detector up and throwing it in the outside bin to dispose of it and I could still hear its faint noises until the binmen came and took it away! Because I was happy with the detector I replaced it with the same model and me new detector has a handy sticker on the front of it reminding me to replace the unit by February 2015.

              I am happy with my Honeywell SF450EN detector; it is corgi approved and available directly from the corgi site for just under £20, a small price to pay for six years peace of mind. I am happy that the unit has the endorsement of professionals in the gas industry and the kitemark also reassures me of the quality of the unit. I think every home with gas or solid fuel heating or appliances should be fitted with a CO detector with an audible alarm and this small battery powered unit would also be suitable for caravaners using calor gas bottles. Carbon monoxide is known as the silent killer, I am very happy that my detector is protecting my household from this danger.

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            • Product Details

              Automatic sensor adjustment function ensures complete accuracy