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Carbon Monoxide Detector - Self Contained - Honeywell H450EN

Discontinued Product

This product has been discontinued.

alternative product

Kidde 10LLCO 10 Year Lithium CO Alarm

  • FREE delivery
  • Product Lifespan: 10 years
  • Battery: Built-in, lasts the life time of your product – GUARANTEED
  • Warranty: 10 year warranty
  • Suitable for wall mounting and free-standing
  • Kitemarked to BS EN 50291-1: 2018 (domestic use)
  • Also suitable for both the Welsh and Scottish 2022 legislation

£20.63 inc VAT

£17.19 ex VAT

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Product Overview

The Honeywell H450EN carbon monoxide detector has a sealed battery with a lifespan of up to 7 years. The detector has red, yellow and green LEDs to indicate normal operation, fault condition and alarm activation. Suitable for wall mounting or free-standing, the Honeywell H450EN detector can be used for domestic applications and for taking with you on holiday.

  • 6 year guarantee, including batteries
  • Sensitivity: 50ppm
  • CE marked and kitemarked to EN 50291: 2001
  • Up to 7 year alarm lifespan
  • Audible alarm output: 85dB
  • Test/hush button
  • Sealed longlife battery - no mains supply required
  • LED indication of normal, fault and alarm condition
  • End of life warning
  • Suitable for wall mounting or free standing
  • Easy to install
  • Front of the unit folds down and provides safety information
Technical Data
Product Code HWH450EN
Brand Honeywell
Dimensions (HxWxD)



Up to 7 years

Operating Temperature

-10 °C to +40 °C

Operating Voltage


Relative Humidity

30 to 90%


50ppm: Between 60 to 90 minutes

100ppm: Between 10 to 40 minutes

300ppm: <3 minutes

Sound Output


Weight 0.20kg
Product Datasheets

Customer Reviews

20 customers have given this product an overall rating of 4.8 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by:

Discreet and does the job

Published on: 31st March 2015

Rating: 5 / 5 Stars

Reviewed by:

Product as ordered, excellent delivery

Published on: 19th March 2015

Rating: 5 / 5 Stars

Reviewed by:

very good product and excellenservicet

Published on: 15th March 2015

Rating: 4 / 5 Stars

Reviewed by:


Published on: 9th March 2015

Rating: 5 / 5 Stars

Reviewed by:

Very good product, helping to keep us safe. Every home should have this product fited in their home,carbon monoxide is ouderless, you don't know if it is escaping from your gas appliance! this monitor does.

Published on: 4th March 2015

Rating: 5 / 5 Stars

Reviewed by:

just what I wanted, doesn't take up a lot of room and does the job

Published on: 15th November 2014

Rating: 5 / 5 Stars

Reviewed by:

Wonderful so unobtrusive you forget they are there.

Published on: 27th June 2014

Rating: 5 / 5 Stars

Reviewed by:

fast service and well packed product

Published on: 30th May 2014

Rating: 5 / 5 Stars

Reviewed by:

I have used this product for the last 10 Years. When I move home 10 years ago. I inherited a British Gas (BG) branded boiler. I then added a BG Gas Fire. For both of these I was issued with the Honeywell CO2 detector. BG are my selected boiler and Fire maintenance providers. They have never questioned the use of this detector. They work and pass yearly inspections. I seen no reason to change brand and product.

Published on: 15th September 2013

Rating: 5 / 5 Stars

Reviewed by:

Very satisfied, particularly liked it was freestanding.

Published on: 18th July 2013

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