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Honeywell H450EN (prev. SF450EN) Carbon Monoxide Detector & Alarm - 7 Year Life

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Product Code: H450EN

Customer Rating: 5 starsRead Reviews

The Honeywell H450EN (previously called SF450EN) is a popular unit (as supplied by British Gas amongst others) and is designed for use in all domestic environments such as homes. caravans and boats. The H450EN is self-contained with an internal battery which does not require replacement for the entire life of the unit.

This unit is widely regarded as the professionals choice of Carbon Monoxide Alarm and is supplied by numerous major organisations including energy companies, local authorities and housing associations.

The latest electrochemical cell technology ensures complete accuracy and reliability giving a 6 year warranty and up to 7 year life under normal operating conditions. It is officially approved and Kitemarked to EN50291:2001 - The European standard for domestic Carbon Monoxide Alarms.

The H450EN has a unique fold down flap on the front of the unit which provides a range of useful information to the user without having to refer back to the comprehensive instruction manual.

No replacement batteries are required for the life of the unit.

Honeywell H450EN Key Features:

  • Dimensions: H – 76mm. W – 110mm. D – 34mm.
  • 6 year manufacturers guarantee - Up to 7 year life
  • Easy to Install & use
  • Automatic sensor adjustment function ensures complete accuracy
  • Continuous self test function
  • Batteries supplied and pre-fitted in the alarm


30 day accounts available

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Customer Reviews

Add your own review

Evie Marsh from Shropshire wrote on 16 May 2012 Rating:5 stars

Great product, great price and super speedy delivery. It gives me peace of mind, something money can (quite clearly) buy. Thanks for an easy transaction. Highly recommended. 5/5.

Patrick from Norfolk wrote on 04 May 2012 Rating:5 stars

Product exactly as described, arrived promptly and was easily installed. Many thanks

J THOMPSON from GRAVESEND wrote on 03 Apr 2012 Rating:5 stars

First class service and item was good value and is exactly what I wanted

Mr R L Davies from Downend wrote on 23 Mar 2012 Rating:5 stars

Excellent service

Fiona McLaren from Midlothian wrote on 19 Mar 2012 Rating:5 stars

Thanks for your message. Felt I had to reply as the service was fast, efficient and ordering on-line was very straighforward. Plus your on-line stock selection is excellent, well illustrated and clearly described and more importantly I found the particular item I wanted whereas I had been unable to find it in stores locally.

Gary Alan Mewes from Egham wrote on 15 Mar 2012 Rating:5 stars

exellent - a big 5 thank you !

Ron Beckett from Cheltenham wrote on 14 Mar 2012 Rating:5 stars

The order process was straightforward, I was notified of acceptance and dispatch, I received the alarm the next day! What else can I say! I would certainly recommend and use your company again, thank you for your excellent service!

Iain Sutherland from Sutherland wrote on 23 Feb 2012 Rating:5 stars

Very much appreciated the fast service. Would highly recommend, thanks.

William Smith from Glasgow wrote on 21 Feb 2012 Rating:5 stars

Thank You for a Five Star Sevice *****

Peter Yapp from Brough wrote on 20 Feb 2012 Rating:5 stars

Hi, Excellent service all round. Pleased with product. Thank you.

Tony Bovill from Ascot wrote on 16 Feb 2012 Rating:5 stars

Fast website - excellent product comparison - price 10% less than quoted by the manufacturer - and 1st class next day delivery.

Malcolm Porter from Glamorgan wrote on 08 Feb 2012 Rating:4 stars

Pleased with product although early days. Prompt response to request and cheaper than Brit Gas alarm which we were replacing. One point that bugged us was VAT added to p & p which we thought should be included. Brit Gas were free p&p but £3 more. Hope after sales service will be as good though would not wish to use as alarm will operate without problem. In view of p&p score 4.

Geoffrey Long from Monmouthshire wrote on 08 Feb 2012 Rating:5 stars

many thanks very good service would use you again

Michael Holland from Co Donegal wrote on 03 Feb 2012 Rating:5 stars

OK You have it.

Johanna I. M. Gray from Aberdeenshire wrote on 31 Jan 2012 Rating:5 stars

Excellent service. The alarm I ordered arrived the next day! My rating: 5.

Frank Buckley from Cheshire wrote on 31 Jan 2012 Rating:5 stars

Every thing arrived ok smoke alarms installed and tested to satisfaction as was the C0 monitor. 5/5

Roy W Rayner from Wantage wrote on 30 Jan 2012 Rating:5 stars

Your service was excellent ~ could not be faulted. Web page easy to use, goods delivered well packed and very prompt delivery. Certainly a '5'.

Jeff Thomas from Shropshire wrote on 23 Jan 2012 Rating:5 stars

I was very pleased with your service as the product was received the next day and put into use immediately. I would give you a rating of 5.

Ann Freeman from London wrote on 23 Jan 2012 Rating:5 stars

I'm so impressed with the speed in which I received my order. Less than 24 hours! I cannot review the items because they have not yet been fitted. But I give you 5 out of 5!

Roy W Rayner from Oxon wrote on 23 Jan 2012 Rating:5 stars

Detectors arrived today, excellent service.

Richard Strachan from West Yorkshire wrote on 23 Jan 2012 Rating:4 stars

Thank You very much for your prompt service. The description of the service was very good. I needed further advice on this product and was able to get it from your service manager. His insight was of importance and made me make the right choice of the type of product you had on offer.. The dispatch e-mail came after the delivery as the order came the day after 'order and payment'. As I was not expecting the delivery the parcel was redirected to the post office for me to collect at my convenience. This Package was not damaged and instructions on fitting the product are clear. I will award 4 out of 5 on your score system only because I had to ring back for advice as the sales manager was busy and my call was not returned as promised.

John Bassett from Cumbria wrote on 18 Jan 2012 Rating:5 stars

Jacques Tostee from London wrote on 17 Jan 2012 Rating:4 stars

The order has been safely delivered and the service, both on-line and on the telephone was good

David Davies from Aberdare wrote on 16 Jan 2012 Rating:5 stars

service was excellent. I rate service as 5 out of 5

Jean Lopez from Bromley wrote on 16 Jan 2012 Rating:5 stars

Thank you so much for you prompt response in sending the Carbon monoxide alarm. I will certainly recommend your company for the service and advice I received. Top marks and thanks

Mike Kane from Kent wrote on 10 Jan 2012 Rating:5 stars

Was very pleased with your response and items ordered arrived swiftly.

Gordon Graham from Warwickshire wrote on 30 Dec 2011 Rating:5 stars

Fast Efficient response , first class . 5/5

ANN CAMPBELL from Sutherland wrote on 23 Dec 2011 Rating:5 stars

good prompt service

Elizabeth Maxwel from Lanarkshire wrote on 21 Dec 2011 Rating:5 stars

1st Class Service.

Kenneth Lea from Cumbria wrote on 05 Dec 2011 Rating:5 stars

Thank you for a quick and easy transaction, the detector arrived and was installed within three days. Five out of Five for your service!!

Jackie Jones from Leigh-On-Sea wrote on 30 Nov 2011 Rating:5 stars

I found the Customer Service very helpful 5 I found the delivery of the product very good 5 I wish i could say something negative, so you could improve it. Just do not ask the person who helped me to leave. Sorry i do not remember the name.

L Campbell from Downpatrick wrote on 21 Nov 2011 Rating:5 stars

Thank you for your efficient and friendly service. I received the Carbon Monoxide detectors virtually the next day to my surprise. We will be installing them in two apartments shortly. Suitable arrangements have to be made with the tenants. I will pass details of your company on to the management company and the other landlords.

Mr Vidal from Uxbridge wrote on 14 Nov 2011 Rating:5 stars

Excellent service and brilliant detector.

Mr Mariusz Wojcik from Middx wrote on 08 Nov 2011 Rating:5 stars

Good

Nigel A. Batt from Berks wrote on 08 Nov 2011 Rating:5 stars

Excellent delivery, competitive pricing. Unit meets all expectations.

Karl V from London wrote on 04 Nov 2011 Rating:3 stars

The first unit I received was broken in transit. It arrived totally smashed. I phoned up and they sent me another one with no qualms and gave me a pre-paid envelope to send back the original unit. Took about a week in all to get a working alarm

Valerie Poppleton from Lincolnshire wrote on 27 Oct 2011 Rating:5 stars

Many thanks for your email. It has been a pleasure doing business with you. I placed my order on 19 October 2011 and delivery was the following day. Thank you !!!

Robert G from Battersea wrote on 24 Oct 2011 Rating:5 stars

British Gas offered me the exact same unit, H450EN but it was a lot more expensive. Saved about a tenner so I'm happy!

Ian Spence from London wrote on 14 Sep 2011 Rating:5 stars

I ordered 4 x of these units. One I received kept beeping and was faulty. A quick replacement was issued and I was refunded for the postage to send the faulty unit back. Dealt with quickly and with no arguments.

Michael Q from London wrote on 30 Aug 2011 Rating:5 stars

Very good service, telephone support and delivery times.

Joanie A from Fife wrote on 24 Aug 2011 Rating:5 stars

I had a boiler engineer around today and he recommended I get a carbon monoxide alarm. He offered me this exact unit and wanted £40 for it! Luckily I said no and searched online and found this. Delivery was fairly quick and it was well packaged. One Very satisfied customer.

Jacqueline from Kingston wrote on 22 Aug 2011 Rating:5 stars

Good price with fast delivery. Would not hesitate to recommend this company or order again.

Mr Hampstes from Salford wrote on 12 Aug 2011 Rating:4 stars

A lot cheaper than British Gas as many other reviews have said. Delivery did take 3 days on a 1 - 3 delivery. Did think I would get in in 1 or 2 hence the 4 star rating. Other than that I'm happy enough.

Mr Hodge from Sutton wrote on 10 Aug 2011 Rating:5 stars

Easy to place the order. Received my parcel in 2 days. Easy to read instructions. Easy to install. Not so easy to write the review as I could not remember my password!! An easy and worry free service and excellent high quality detector.

Gina S D from Weymouth wrote on 26 Jul 2011 Rating:4 stars

Took a little bit longer than expected, but the detector is really good. There is a flap on the front which has what to do in the detector goes off which I think is brilliant.

Carolyn C from Loughborough wrote on 21 Jul 2011 Rating:5 stars

Was recommended this detector by British Gas, but they wanted a lot more money for it! Arrived in a couple of days and was very well packaged.

Arthur S from London wrote on 13 Jul 2011 Rating:5 stars

I bought this unit after British Gas recommended I bought a CO detector for my boiler. The alarm is extremely loud and I can hear it easily throughout my entire house ( I live in a bungalow). Delivery was fast and I thought the overall service was excellent.

Krishan from London wrote on 12 Jul 2011 Rating:5 stars

British Gas wanted £29.99 + Delivery for this exact unit! Couldn't believe it when I saw this price. Received the two I ordered in a couple of days. 5 Star Service without a doubt.

Ms Seing from Hammersmith wrote on 05 Jul 2011 Rating:5 stars

Brilliant detector. A lot better than my old one. It was delivered in a couple of days so a good service all together.

D Daring from East London wrote on 30 Jun 2011 Rating:5 stars

Installed two of these at home. East to install and look really good.

George from Croydon wrote on 29 Jun 2011 Rating:5 stars

Collected from their office. Really well designed detector.

H Hearn from Shrewsbury wrote on 29 Jun 2011 Rating:5 stars

Overall a flawless service - Both this and the smoke detector I bought are excellent.

Mr Ray from Manchester wrote on 24 Jun 2011 Rating:5 stars

Couldn't of asked for a better service. Was instantly sent a invoice, and was emailed when the item was dispatched, being told what courier it had been sent by. The detector is brilliant and at a really good price. Thank You.

Claire from Surrey wrote on 24 Jun 2011 Rating:5 stars

I bought this detector, after my daughter recommended this company as she bought from them before. Really pleased with the detector and the service was excellent.

Lucy from Surrey wrote on 23 Jun 2011 Rating:5 stars

Excellent service and detector. Extremely pleased.

Karl O from Thetford wrote on 23 Jun 2011 Rating:5 stars

Brilliant detector. The bit on the front of the detector that flaps down and shows what to do in the case of an alarm is brilliant. Hopefully the alarm wont go off but if it does I wont have to scramble for the manual as all the information I need is on the front of the detector. Brilliant.

Yvonne from London wrote on 15 Jun 2011 Rating:4 stars

When the parcel arrived the packet was slightly torn but goods were bubble wrapped up and still intact inside Apart from that everything was fine.

Stuart from Aberdeen wrote on 14 Jun 2011 Rating:5 stars

Delivered next day as ordered. Cheapest price that I found. Overall a quality service.

Elizabeth D from Yorkshire wrote on 19 May 2011 Rating:5 stars

Thank you for your prompt service, the detector arrived in 2 days.

STEINERT from LONDON wrote on 17 May 2011 Rating:5 stars

A good item at a good price. Pity about the delivery charge!

Ryan from Ealing wrote on 17 May 2011 Rating:5 stars

I googled this after British gas wanted £35 for this unit! Bargain!

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